? on Matching driveline components.

[Curly]

I'm trying to finish up my driveline for an A pu. I want to make sure my stuff is going to "work together" before I get to far into the project.

Motor is a '65 283. I had the heads rebuilt, new stock style springs, stock size valves, hardened seats and a good 3 angle valve job. Built more for reliability than the flyweight big dollar racing stuff.

The casting number on the heads is 3884520. Mor-tec says...60-67...283 & 327..Some marked "Made in Canada", 60cc chamber, also used by Studebaker.

I assume that these are small runner heads that are great for low end torque.

Carburation is two Carter 625's on an Offy low-rise dual quad 360 manifold. Cam is the old standby 350 horse 327 cam. I'm running +.030 over 8.5:1 flattop pistons and the dizzy is a Mallory marine dualpoint. The weight of the truck is about 2200 lbs. I'm using a Muncie 4 speed from a '68 Chevelle. It is running to a Ford 8" posi that I figured the gear should be around the 3.5-3.7 range.

Can anybody see anything that is going to be an issue???Like maybe to much carb? Too much cam for such a little motor? Wrong distributor? This thing might get wound up to 6500-6800 r's (when I miss shift http://www.jalopyjournal.com/ubbthreads/images/graemlins/crazy.gif) but not a regular basis.

[Paul]

good choice on the transmission,

not so sure on the rest http://www.jalopyjournal.com/ubbthreads/images/graemlins/tongue.gif

actualy it all looks ok except the 283 part,

the cam was meant for a motor that moves more air,

that 1250 cfm of carburation is more than I run on my big blocks,

the dist. being a marine unit may have been meant to work best at a more constant range then a typical street dist.

gearing sounds a little high for that combo.

a relativly low compression of 8.5:1 in the little motor with a big cam and high gears might work in a light car with a manual transmission but the power band won't come on till youre doin a hunnert..

I think if you go for a bigger block like a 350, 383 stroker or a 400 and it would work better.

[Deuce Roadster]

[ QUOTE ]
It is running to a Ford 8" posi that I figured the gear should be around the 3.5-3.7 range.

[/ QUOTE ]


I doubt that the gear is 3.5 to the 3.7 range.......

Most are 2.79 and 3.00

3.40 and 3.5 are considered a REAL find......but so is a POSI...maybe you got lucky http://www.jalopyjournal.com/ubbthreads/images/graemlins/confused.gif

The combination looks good IF you have that gear.....


http://www.jalopyjournal.com/ubbthreads/images/graemlins/grin.gif

[Curly]

You are correct 2.79 and 3.00 are the common finds and IT DID take me a while to find a posi unit. It is currently a posi with the 3.00 in it but I meant that I was going to replace the 3.00 set with something in the 3.55-3.73 range. Also forgot to mention I'm running the 29" tall M/T 10.00" wide cheater slicks too.

[Deuce Roadster]

http://www.jalopyjournal.com/ubbthreads/images/graemlins/grin.gif

Ford lists a 3.80......C30Z4209D...but I have NEVER seen one...

Then there is a 3.55, a 3.50 and a 3.40 from FOMOCO

They are mainly found (at least around here in the South) under older stuff.....65 Falcons, 65 - 66 Mustangs and such.

Ford made a Pinto Crusing wagon.......a sedan delivery kind of thing........all 3 of them I have looked at had the 3.40....... http://www.jalopyjournal.com/ubbthreads/images/graemlins/grin.gif



.

[Curly]

[ QUOTE ]
:Ford made a Pinto Crusing wagon.......a sedan delivery kind of thing........all 3 of them I have looked at had the 3.40....... http://www.jalopyjournal.com/ubbthreads/images/graemlins/grin.gif.

[/ QUOTE ]

I remember them quite well...I had this twisted young mentality that thought if you used a tube frame and put a SOHC in one of those babies you could stuff tons of rubber in the back and no one would see it...I think it was about 1977??? http://www.jalopyjournal.com/ubbthreads/images/graemlins/grin.gif http://www.jalopyjournal.com/ubbthreads/images/graemlins/grin.gif http://www.jalopyjournal.com/ubbthreads/images/graemlins/grin.gif Before mulletts were known as mullets and when a van was a pork palace with a disco ball for mood enhancement! http://www.jalopyjournal.com/ubbthreads/images/graemlins/blush.gif

[draggin'GTO]

The 520 heads are Power Pack heads (small high-velocity ports and valves like all 283 heads), they should give you 9.5:1 compression with flat top pistons. Too much carb, a pair of 500s would be the ticket. The original dual-quad 283s had a pair of WCFBs that flowed around 400. Cam might be a bit much for any low-speed lugging, but with a 3.70 gear in a light truck you may be OK, 3.90 with the tall 29" tire would be better. If you have a 3.50 gear (time to find out by spinning the driveshaft to see how many turns it takes to make the tire rotate once) I would consider stepping down about 10 degrees on the cam.

----- Bart -----

[Fat Hack]

Aftermarket gears are pretty plentiful for your 8" if you need them...my old Pinto ran 4.56:1 gears or something close to that in a Mustang II 8-inch...lotsa fun on the freeway!

Your combo doesn't sound too shabby...you have a fairly light vehicle with a four speed and you're gonna put decent gears in it. Allow me to throw in a recommendation for something in the 3.80-3.90 range...that ratio works GREAT in a dual purpose (street/strip) vehicle with a small block and a four speed.

The two Carters should be okay...they are pretty simple to tune, and you can even run progressive linkage if need be. The old low-rise dual quad set-ups with Carter carbs worked pretty well on Vettes and other Chevys back in the late 50s and early 60s! Most of those were 283, 301 and 327 engines!

8.5:1 compression will make the motor compatible with most pump gas octane ratings, but may hurt ya SLIGHTLY. 9.5:1 would make the motor a little more potent, and still able to drink pump Premium.

Overall, your chosen combo should prove fun to drive! As always, though...the Devil's in the Details! Take the time to tune it correctly, making sensible changes one at a time until you've got your fuel delivery, spark advance and starting line technique optimized!

[Curly]

My mistake...typo on the compression ratio DragginGTO you are correct that is 9.5:1. I thought it was too much carb...I'm thinking of going with the 3-2 setup with small Rotchesters. Maybe Edelbrock has something more in line for what I need when it comes to two four bbls though.

So you think the 3.90's would be more in line for what I need? I haven't bought the ring and pinion yet so this is good news. I didn't want to overgear this little motor with a set of 4.11's so I held off on buying the r&p.

I've been told the cam is great for these motors by some people and others have told me it is way too big. Sounds like it might load up until I start getting up in the R's

I have no idea what kinda horsepower and torque numbers this combo will make but I'm hoping for a little more than 250HP/250 ft/lbs with this short arm mini mouse.

[Fat Hack]

The cam should work GREAT! We put a 350/300hp cam out of my old Chevelle's 350 into my buddy's stock 283 two barrel as we were rebuilding it in his driveway, and it worked wonders!

(The quickie rebuilt 283 went into his ratty 71 Ventura with a Powerglide...and the car was decent quick for what it was...WAY faster than it had been with the lame 307 he fried shortly after getting the car!)

Don't worry too much about the carbs...propper metering rods, a little fine tuning, and two smaller (625cfm or less) Carters will serve you well!

[draggin'GTO]

The 300HP 350 cam is 195/202@.050, .390"/.410" lift, pretty much the same 'generic' stock cam that came in most all of the lower and medium-performance small-blocks (275/300/330 HP 327 & 200/270/295/300 HP 350 among others). By comparison the 350HP 327 cam is a LOT bigger, 222/222@.050, .447"/.447". If the car had an auto trans with some converter slip the big cam may work OK. But without the torque multiplication of a converter running a manual trans I would err on the smaller side in cam choice, always better too small than too big.

Crower sells a nice High Performance Compu-Pro hydraulic, RPM range 1600-1800 to 4500-4800, Redline 6000+. Part # 267HDP, 210/216@.050, .445"/.445" lift. Made for a 9.5 to 10.5:1 262, 265 or 283 with performance carburetion and exhaust headers along with the proper lower gearing. Sounds like a match to me. http://www.jalopyjournal.com/ubbthreads/images/graemlins/cool.gif

----- Bart -----

[nobux]

Back in the 60s, my dad had a 66 Impala 2dr hdtp(still has it) with a 283, 327-350hp cam, Tarantula single plane, 600 Holley with a 4 spd Saginaw. He ran 4:11 gears with 29" slicks. The car was suprisingly quick for the little motor in a big car(3700lbs). Granted, he was running against other 283s and 327s, but your truck weighs about 1500lbs less. I'd use your combo with the smallest carbs you can find.