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Technical Tell me about the C3B or C3BX manifold

Discussion in 'Traditional Hot Rods' started by Greasyman, Jan 27, 2018.

  1. 1Nimrod
    Joined: Dec 11, 2018
    Posts: 121


    Bullit68; That's what mine is going on 327 in my 68 C10 pick-up. Hope i can get some info about your C3B if you don't mind? What side is the oil fill tube on? And does your C3B have the upper runner's on the driver's side or passenger side? And does it have a notch in the plnum? And does it have duel bolt pattern on the carb base? And does it have the coil mounts? And does it have a chok pull off? I know alot of questions but just trying to see how many variations are out there especially the C3B's and C3BX's that use the older C4B mold (they look more like the C4B's cuz the upper runner's are on the driver's side and are longer and the early C4B's really look more like the early 1960's Chevy Vette intake manifold with four hole's in the top to match the Holley 4bbl carb and have the long dog leg runner's on the driver's side like the C4B's do. They have been mentioned before in the HAMB by other members.) If you have the time to respond to the question it's much appreciated. Thank You, from 1Nimrod
    Deuces, RICH B and deathrowdave like this.
  2. swept57
    Joined: Jan 9, 2011
    Posts: 2

    from Akron, OH

    A little hard to read, but Edelbrock ad describing difference between C3B and C3BX.

    Attached Files:

    1Nimrod, catdad49, loudbang and 3 others like this.
  3. belair
    Joined: Jul 10, 2006
    Posts: 8,040


    brad54 did a little comparison on some intakes. You might do a search. I have a C4B
    1Nimrod, loudbang and Deuces like this.
  4. OLSKOOL57
    Joined: Feb 14, 2019
    Posts: 231


    Bought new C3BX in 1972 for 1969 DZ 302 engine in my 1955 Chevy Hard Top. 750 Holley DP./LT-1 Cam/12:1 Comp./12 Bolt Posi-5:13 Gear./Muncie 4-Spd.Close Ratio Trans.......Damn that Car was quick( to me anyway)
    1Nimrod and Deuces like this.
  5. Tut59
    Joined: Apr 25, 2019
    Posts: 4


    I know this thread is about the C3B. I just picked up a C4B on Ebay for $25.00, seems nobody wanted it. oil fill tube is to the left, doesn't appear to be butchered, a little pittining around the water jackets. Going to put it on my 0.030 over 327, 461 double hump heads, 2.02 int, 1.60 exh, Clay Smith "Tracksmith" cam, 10.1 Keith Black pistons. was thing about a Holley 650cfm on top. All this backed by a M21 with 3.08 and locker going in a 59' Apache.
    1Nimrod, 47ragtop and Deuces like this.
  6. joel
    Joined: Oct 10, 2009
    Posts: 1,505


    I don't recognize the cam , but the only thing I would change is the 3.08 gear. The C4b manifold should work fine with the rest of the engine components. As described, with 28in. tall tires, you should be 81 mph at 3000 rpm. I had a combo like this and always wanted a lower gear. JHMO
    Deuces likes this.
  7. 1Nimrod
    Joined: Dec 11, 2018
    Posts: 121


    Tut59; Sounds almost like my build for my 63 C10 pick-up except my 461's are 194/150 and I have 3:73 gears. I was looking for a 650 DP/DF Holley found some in HAMB parts for sale but gentleman backed out at the last minute and decided not to sale one of his two he had up for sale. Now having issues with my 327 rebuild. But I like your set up seems it would be nicer with different gears! But way cool truck, maybe just the right gears if your driving highway speeds alot? Can you put up pics of your C4B for us all to compare with the other ones? Thanks and have fun with your Hot Rod 59 Apache.
  8. DDDenny
    Joined: Feb 6, 2015
    Posts: 12,034

    from oregon

    With that 3.08 gearset and a heavy truck the M-21 will make it hard to get rolling and hard on the clutch, a better choice as far as a Muncie is the M-20 with the lower first gear.
    Like others said; a 3.73 gearset is more in line with your combination.
    1Nimrod likes this.

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