Thread: help me out please

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currently have an engine that i had in my camaro but the oil pump messed up and something majorly went wrong with that. I have everything on this engine is stuff i had around the house from my father and parts cars.


ok so the block casting number is 3970010 and i know it was a 1974 passenger car and a 2 bolt main.

and the suffix code is cmj which shows nothin hardly but that this is was a 4 barrel motor..

and as of heads i have 14022801 305 head and these are 53cc chamber head BUT with the big valves.

if i use the two together i am aware the compression will be high so i was wondering what kind of cam setup i should go with and some other things.

i also have a 327 block "if this might be better ill get codes of engine" and 283 crank i could use and make a destroked 327 but like i said idk how these heads would work good on what or anything. im going for the most horsepower i can get mid to high throttle with a small budget..

i would like to hear opinions please. thanks.

also i didnt know what cam this engine has in it i do know the person said it was the "biggest" cam they had in stock at there advance auto but i do know it had a pretty smooth idle..

Probably a lot better choices for heads then 305 heads, even a set of Vortec heads would be a huge improvement...

How about keeping the 350 block and innards, then selling or swapping the rest of the small block parts you have and come up with a decent pair of heads??? As for the old cam--probably not a good idea in a fresh engine... Budget is one thing, but don't cut yourself so short that you end up with an engine that won't last......

well, i do know that these heads had the large 194 valve for the 305 heads at least. i know compression makes power, but flow is a must.. but Im 19 years old and im sure you know plenty more than i do. Unfortunatly im just trying to get by with what i have right now.. and i am capable of doing some porting on the heads myself. unless its just a pure waste of time. being 53cc with the pistons i have this would be almost 11.1 compression maybe to high but this isnt my daily driver.

as for the cam, i shouldnt have said it as i did i apologize.. it was brand new when i put it in my engine, it just wasnt in the box and it was lost.

i did have this engine assembled with these heads and cam. New oil pump and all. unfortunatly i was forced to start the engine before i wanted due to my graduation project timeline.. not as clean and such inside as i wanted "bottom of oil pan". I figured out today i spun the #8 bearing and im thinking being its closest to the oil pump it got all the gunk first causing this..

Originally Posted by 91camarors350

and as of heads i have 14022801 305 head and these are 53cc chamber head BUT with the big valves.

I don't know what you mean by "big valves", but it's not just the valves that make the head, it's also the runner sizes and shapes. The intake runners in those 305 heads were designed to feed 305 cubic inches up to around 5000 rpm's max so that granny could use the motor to drive to and from Bingo. They will be at a severe disadvantage trying to feed 350 cubic inches to anywhere near 5000 rpm's. I'll try to put this delicately....toss those turds over the fence and get some heads that'll work.

Originally Posted by 91camarors350

if i use the two together i am aware the compression will be high so i was wondering what kind of cam setup i should go with and some other things.

Static compression ratio would be around 11.0:1 and you'd have to use a race cam to keep the motor from detonating on pump gas. The race cam would require a minimum 4000 stall torque converter and 4.10-4.30 gears in the differential. You would make no power under 3500 because the intake valve would be closing so late that you would capture insufficient fuel/air mixture to make any power (with the intake valve still open, the piston coming up the bore would push the mixture back up the intake tract and out the carburetor) and you would have no power over 4500 because the heads would stall due to the small runners. Are you beginning to see the futility of using those fosdick heads on a 350? I'm painting a grim picture on purpose so that you will not try to use them and be disappointed.

Originally Posted by 91camarors350

i also have a 327 block "if this might be better ill get codes of engine" and 283 crank i could use and make a destroked 327 but like i said idk how these heads would work good on what or anything. im going for the most horsepower i can get mid to high throttle with a small budget..

If this is a small main journal 327 block, the 283 crank will work in it, making a 302. The problem will be finding affordable 4.000" pistons that have the proper 1.800" compression height. You would also need small journal connecting rods to bolt onto the 283 crankpins.

Originally Posted by 91camarors350

also i didnt know what cam this engine has in it i do know the person said it was the "biggest" cam they had in stock at there advance auto but i do know it had a pretty smooth idle..

You can't just pick a cam off the shelf without knowing the static compression ratio of the motor. All the parts that go into a build have to be built to a "combination" of parts that work together in symphony with each other.

I don't mean to sound harsh, but you have a lot of learning to do. I suggest that you begin by reading everything you can regarding engine combinations and how they work together. There is a ton of information on the internet and it's free.

Here are some titles I would suggest for you to get started on....
Cylinder head intake runner volume
Cylinder head exhaust runner volume
Cylinder head flow
Cylinder head flow bench
Static compression ratio
Dynamic compression ratio
Piston compression height
Cylinder block deck height
Piston deck height
Squish
Quench

As you wade through some of these, other areas of interest will reveal themselves to you and you'll expand your searches....Good Luck.

yes sir, but you also have to understand that i do have a budget, though some would be smart and say that if i have such a low budget i shouldnt be trying to do this then they wouldnt understand. As of saving. I am, Im aware of a lot more that i give in the forum but i completly understand where you are coming from. At the time i put this together i was in an extreme rush and i had no choice on what i got. While this engine ran, it was strong very torky* lol engine i might add "for what it was" it also did run fine on 93 octane.

Im sorry if it seems as if I am rejecting your contructive critisizm because i definatley am not, but i do beleive in some "perfromance" application these heads can perform well