Olds 350, Differences between 1970 and 1972

[KCEE442]

Thanks everyone for the advise/input! very helpful!

so i ended up picking up the 72 long block ended up being a 2bbl.seems real clean and turns over by hand
real smooth. i pulled the valve cover off on the drivers side and poked the oil valley (?) closest to the waterpump
and it seemed to be gunked up a bit ( mabye bc the motor has been sitting for a year? ) the other valley
closest to the flex plate seemed alot better. other wise looks good so far, going to dry and wet compression
test it to see whats going on then pull the heads to ck the cylinder walls and the condition of everything elese.

In reguard to the intake, i got a edelbrock performer..should have went with the rpm but i had intensions of
putting it on my 307.

what i want to do with the motor is if all is good with the bottom end ill just keep it stock and possibly bearings/rings
and the top end is where i want to focus,,get the heads done, nice cam, roller rockers/lifters. pushrods. pistons?
any advise or any combo to suggestion?

 

[KCEE442]

it has been bored .30 over,has speedpro forged aluminum flat top pistons,edelbrock timing chain set,comp cams high energy pushrods and 1.6 ratio rocker arms that are full roller,mondello soild roller lifters,lunati 244/304 camshaft,clevite bearings,edelbrock performer rpm intake manifold,holley race 4150 750cfm double pumper carb,hei ignition with DUI coil,accel 8mm wires,dynomax headers.It makes 402 horsepower @ 5000 rpm and 499 FT LB torque @ 2500 rpm.The 7A heads have been completely ported and has 1.995 intake valves and 1.624 exhaust valves.It was in an 86 cutlass supreme drag car with a th350 and 3.55 gears with posi and ran 12.50s,thats damn near perfect for me

Wow thats a really nice setup! i might just have to copy that to the T haha

 

[marcar1993]

it has been bored .30 over,has speedpro forged aluminum flat top pistons,edelbrock timing chain set,comp cams high energy pushrods and 1.6 ratio rocker arms that are full roller,mondello soild roller lifters,lunati 244/304 camshaft,clevite bearings,edelbrock performer rpm intake manifold,holley race 4150 750cfm double pumper carb,hei ignition with DUI coil,accel 8mm wires,dynomax headers.It makes 402 horsepower @ 5000 rpm and 499 FT LB torque @ 2500 rpm.The 7A heads have been completely ported and has 1.995 intake valves and 1.624 exhaust valves.It was in an 86 cutlass supreme drag car with a th350 and 3.55 gears with posi and ran 12.50s,thats damn near perfect for me

You run pump gas? If so, I doubt that's a truthful 11.77:1. That is a whole latta compression for pumpgas.With 11.8:1 I'd be thinking your're in the 110-116 octane range with iron heads.

 

[Minion1186]

the engine has to run on a mix of 93 and 110 super unleaded octane.If i'm just cruising around,not romping on it i'll have to run 93 and some kind of octane booster like 104+.Yes it is 11:77.1 compression,and i sure as hell won't be driving the cutlass around as much with this sort of engine,it'll be driven every now and then.

 

[jrm81bu]

I hope you know that octane booster will only turn that 93 ninto 93.5. Its pretty much worthless stuff.

 

[bigdan]

going over 10.5 for a street engine is looking for trouble , or as you stated : not use daily
mixing all that crap in the gas is pure hell for me !
a good 10.0 to 1 gives great result without all the troubles !
10.5 to 1 with 240dur cam is the limit ...for me !