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428 Police Interceptor Motor questions

Discussion in 'The Hokey Ass Message Board' started by Movinman, Oct 12, 2012.

  1. Movinman
    Joined: Feb 20, 2005
    Posts: 850


    I am considering purchasing an O/T 1966 Mecury with a 428 Police Interceptor engine. I know nothing about these FE motors. Were these good motors for Ford? Are they worth playing with? Are speed parts readily available for these?
  2. Tim
    Joined: Mar 2, 2001
    Posts: 7,158

    from Raytown Mo

    In short, yes.
  3. porknbeaner
    Joined: Sep 12, 2003
    Posts: 38,755


    Well it was built to chase down hot rodders in that whale of a mercury if that answers your question.
  4. 73RR
    Joined: Jan 29, 2007
    Posts: 6,003


    Great engine and plenty of aftermarket support for anything you want to do.
    Just do a basic search for 'ford fe engines' and start trolling web sites.

    Register now to get rid of these ads!

  5. F-6Garagerat
    Joined: Apr 12, 2008
    Posts: 2,650


    My buddy FE guy, he had one. Said it was the same as the CJ engines.
  6. Kentuckian
    Joined: Nov 26, 2008
    Posts: 680


    Are you sure it is a 428 PI? In 1966 the full size Mercurys also came with a 410 or a standard 428. If the Mercury you are looking at still has its original engine, the cars serial number tells what engine it came with. Do some research on the internet.
  7. Kentuckian
    Joined: Nov 26, 2008
    Posts: 680


    The CJ engine was not the same as the 428 PI. The CJ had a better block and heads.
  8. outlaw256
    Joined: Jun 26, 2008
    Posts: 2,021


    yes, yes and some more yes, if its the true one then even one more yes.ive been lookin for one for a long long time. still havent found one.atleast not one i could ive got a floor full of 460s and 429s but i stll have a hole where the 428 it build it and get ready for a RIDE!!!!
  9. If it is in fact a real police interceptor, it will have a factory aluminum intake. It is the basis for a great engine. Even stock a PI is a good engine with a lot of upgrades over the basic 428.
  10. Don't listen to these other guys. That thing isn't worth a damn. Your best bet is to box it up and send it to me so I can dispose of it properly. :D

    365 Hp and 459 ft-lbs of torque from the factory, yea, they do all right.
  11. Movinman
    Joined: Feb 20, 2005
    Posts: 850


    Thanks for the info, guys. I am going to look at the car tomorrow, so I will know what I have at that point.
  12. rustang
    Joined: Sep 10, 2009
    Posts: 709


    I have an OT 428 FE and it's a sweet motor... I would and do want to find another... :)
  13. 56sedandelivery
    Joined: Nov 21, 2006
    Posts: 4,388


    I'm not a Ford person, BUT, a friend had one, a 428 or 429 Police Interceptor (can't remember exactly) in a Ford pickup truck with an automatic, aluminum intake and Holley carb, and headers. I wanted that truck, it was a sleeper, but he just used it to haul stuff with. He had bought it that way. He wound up selling it without even asking me, and when I asked him why, he said he did'nt think I'd be interested in it since I'm a Chevrolet guy. And this was after I let him store his 39 Plymouth Coupe, with SBC and GM powertrain, for about a year and a half, in my garage, free of charge! Like I said, I'm not a Ford guy, but if it's a big motor, "it's a big motor"!!! (like Chris from "Sons' of Guns" would say). So, I'd get it. Butch/56sedandelivery.
  14. Ole don
    Joined: Dec 16, 2005
    Posts: 2,914

    Ole don

    I knew a guy who claimed he put a 428 PI in place of a 391 in a ten wheeled dump. He claimed he could haul potatoes faster than anyone in the whole valley.
  15. Cerberus
    Joined: May 24, 2010
    Posts: 1,370


    Absolutely! X2. Just don't expect it to be anything like a high-reving, huge bore & short stroke, high nickle content, powerhouse, the 427 is.
  16. hvywrench
    Joined: Sep 29, 2011
    Posts: 157

    from N.W. Conn.

    I have a '68 PI from a CT State Police Galaxie in my '73 F-250 High-Boy.
    Lots of torque, has been trouble free since the early 80s. Took me to Ft Benning and back in that truck, plowed a bunch of snow, too.
    Freshened up the heads a few years ago and that's all that's been done since it was rebuilt in the 70s.
    Came from the factory with an aluminum intake.
    The block has the extra webbing to strengthen the mains.
    I'm pretty fond of mine.
  17. propwash
    Joined: Jul 25, 2005
    Posts: 3,858

    from Las Vegas

    428PI went into the majority of 1967 Shelby GT500s. Great power, especially in a lighter car.

  18. 36cab
    Joined: Dec 2, 2008
    Posts: 436


    I had a 68 Shelby GT500 with the 428PI and it ran hard. I believe Shelby changed the name to GT500KR when he started putting the 428CJ's in them.
  19. soda pro
    Joined: Nov 16, 2008
    Posts: 7

    soda pro

    I have a cj 428 from a 68 mustang for sale. Soda Pro
  20. hoop98
    Joined: Jan 23, 2013
    Posts: 1,362

    from Texas

    66 P Code 428s had solid lifters, 67 and up had hydraulic.

    Q code is the regular 428.

    428 P and Q had the smaller valves.

    I=2.022"-2.037" E= 1.551"-1.556"

    Intakes and cams changed over the years, the P was in the Shelbys until the CJ.

    Cast iron (all after 12/1968 except Shelby)
    Aluminum ("P" thru 12/1968 & all Shelby GT 500)

    Autolite 4100 (4V-1966-67)
    Autolite 4300 (4V-1968-70)

    Holley 4160 (2x4V- 1967 Shelby GT 500)

    Holley 4150 (4V -1968 Shelby GT 500)

    Put a set of Edelbrock heads on it and it will fly and is pretty light for a big block.

  21. falcongeorge
    Joined: Aug 26, 2010
    Posts: 18,506

    from BC

    PI's are kinda like the the FE equivalent of "corvette motor". Probably a 410, not that that is a terrible thing just dont pay PI $$$. Take a magnet, see if it sticks to the intake.
  22. George
    Joined: Jan 1, 2005
    Posts: 6,762


    The KR was a normal 500 with a differnt decal on it. Shelby heard that Chevy was going to call a version of the Vette "King of the Road", so he had some GT-500 KR decals made up & stuck em on a number of cars in assembly. Admitted a few years ago that they are standard 500s.
  23. hoop98
    Joined: Jan 23, 2013
    Posts: 1,362

    from Texas

    I'm pretty sure the KR's were the CJ's

    The 1968 Shelby Cobra GT 500 KR
    King of the Road
    by Dennis Begley

    Ford offered the Cobra Jet engine for the first time in 1968 1/2. Carroll Shelby, always one to up the competition, be it Ford or GM, put the 428 CJ engine in his GT 500 Shelby Mustangs about two thirds into the model year. It was cheap horsepower. Early '68 GT 500's were given Ford's 428 police interceptor engine. Rated at 360 hp at 5400 rpm, the big block produced 420 ft. lbs. of torque at 3200 rpm. Mid-year, Shelby got wind that GM intended to introduce a 396 Camaro and call it "King of the Road." Shelby beat them to it. Before GM could follow through, Shelby American offered a GT 500KR, King of the Road and stuffed the Cobra Jet engine under the hood.
    The 1968 GT 500 KR was a very special car. Many modifications were made to the stock GT Mustang. The 428 was the same Cobra Jet engine offered in the stock big block Mustang. It was the old 428 block with a lot of changes. The low riser, revised, 427 heads had huge rectangular ports. Measuring 2.34" X 1.34", the ports were larger than the 427 racing heads. A special dual-plane intake manifold held the mammoth Holley carb. Stronger connecting rods and crankshaft replaced the stock 428 pieces."
  24. Deuces
    Joined: Nov 3, 2009
    Posts: 12,293

    from Michigan

    Think they used the "Lemans" rods in the KR motor...
  25. hoop98
    Joined: Jan 23, 2013
    Posts: 1,362

    from Texas

    KR production ended before SCJ began 1969 model year

    "The CJ connecting rod differs from standard FE rods only in it's use of larger 13/32"-24 x 2 5/32" bolts (C2AZ-6214-B bolts with C0ME-6212-A nuts; the 390 and standard 428 use C1AZ-6214-A 3/8"-24 x 2 7/32" bolts with C1TE-6212-A (replaced by C9AZ-6212-B) nuts). The SCJ connecting rod is a "LeMans" style rod that is about 70 grams heavier than the CJ connecting rod. In addition to the extra material, the SCJ rod uses 7/16"-20 x 1 3/4" 12-point capscrew bolts (service part number C9ZZ-6214-A) to secure the end caps to the rod. The OEM bolts are typically replaced with stronger aftermarket fasteners from companies like ARP when assembling rods for use in high performance engine builds."

    The top rod is the "lemans rod"

    Last edited: Mar 30, 2013
  26. Engine man
    Joined: Jan 30, 2011
    Posts: 3,020

    Engine man
    from Wisconsin

    Not quite. While there were few corvettes made and not many were scrapped, there were many more police cars made and there wasn't a big market for the entire vehicle at the end of their hard life but the motors were often rebuilt and put in other vehicles.
  27. hoop98
    Joined: Jan 23, 2013
    Posts: 1,362

    from Texas

    If it's the original engine, the codes are
    P=428 PI

    C6AZ-9424-H is the 66-69 PI intake
  28. falcongeorge
    Joined: Aug 26, 2010
    Posts: 18,506

    from BC

    Its an inside joke, I realize not everyones gonna get it.
  29. pdq67
    Joined: Feb 12, 2007
    Posts: 787


    I'm here to say that all of the old FE engines are "hauling as*" motors.

    From way back to the '58, 332, up to the 427's and '8's!!

    Biggest deal to me was that the cast-iron intake was too heavy, therefore an aftermarket intake may lose 50 pounds or more??

  30. k9racer
    Joined: Jan 20, 2003
    Posts: 3,047


    Just a reminder if you are using what was called the 7 thousand rpm rods. Do NOT re use the rod bolts. These units are streach torqued. Many years ago [[1970]] I sold a 427 engine to a friend. He refreshed the engine and did not replace the bolts. He said they looked ok and he did not have the money to replace the bolts. After 15 or so hot laps it came apart. The next time I told him something he listened.. Fast forward to today I have a OT truck with a 68 427 FE its a friends old tow truck now the fastest truck that hauls scrap metal.

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