okay picking up my first old motor this weekend(1972 350r) and don't know where to start.all my friends say i'm crazy for building a olds motor but i need something diff.look to get a **** load of power out of it.has the #7 heads on it and its going in a 82 grand prix th350 trans 2800 stall b&m shift kit and 3.73 gears.should i just put a cam,headers,intake and carb.or just find a 403?and my goal is to run mid 12s with a 150 shot gas

 

You came to the right place. Just hold on and be ready to answer specific questions and don't get mad if someone plays with you a little. This is the first place I always go. Good Luck.
Tom

 

Here is an interesting build for you to check out.

Olds 350 gas block (395558 2)
10.4:1 compression (93 octane)
.030 over, stock stroke
Speed-Pro Forged flat-top pistons
Speed-Pro rings (I file fitted them)
re-sized factory rods with ARP bolts
cast crank, polished and chamfered
.039 Fel-Pro head gaskets

camshaft:
JM-22-25-10 hydraulic flat
FREEBIE !!!!
274/280 duration......230/236 @ .050......... .512/.523 lift

heads:
#4 heads
combustion chamber measured out at 62 cc's
3 angle valve job by Rocket Racing (SMALL VALVE HEADS 1.87/1.56)
No porting at all
Comp Cams roller tip rockers and pushrods (no fitment issues)

induction:
Performer RPM intake
650 Holley double pumper

exhaust:
1 3/4 A-Body headers with some 3" dynomax turbo mufflers hanging off the headers

ignition:
stock HEI
35* total timing
Accel 8.8 Plug wires
Accel plugs

Trans:
I rebuilt a TH-350 (soft and hard parts)
Trans Go shift kit
3000 stall converter

Rear:
GM 8.5 rear with 4.10s and factory limited slip

Tires:
Mickey Thompson 275/60R-15 ET street drag radials, 28" tall

Suspension:
Comp 3 way adjustables in front..............thats about as fancy as we got with suspension, everything else is stock

Fuel System:
RobbMc Fuel pump (kick ***)
16 gal. fuel cell

THE FACTS:

60ft- 1.688
330ft- 5.111
660ft- 8.017
MPH- 84.23
1000ft- 10.567
1320ft- 12.744
MPH- 103.36

Temp- 53*
Humidity- 88%
Dew Point- 50*
Barometer- fair (my gauge reads 29.34, gauge isn't calibrated yet)

Im guessing the car weighs about 4000lbs. We also did not have wide open throttle on this car.

fancy port job.....big valves.......exotic bore/stroke combination.......expensive pistons........main girdle.......solid flat tappet.....you won't find it in this build

 

Build it, then have fun.

 

Ditch the stock pistons, get some L2320's.
Keep those cylinder heads. Put some 2.0 intakes in them. 3-4 angle valve job. Fill heat risers. Headers. Cam.
E-brock rpm performer. Q-JET!

I too, want the free Engle cam!

 

i did the same combo you better have lots of gas money

 

really don't want to touch bottom end unless i have to

 

The problem is building more than the 8:1 compression with those factory pistons.
Do not cut the heads more than .060.
I hope you do put in a new timing set, and oil pump. Half of the old plastic timing gear will be in the pickup for the pump.
Your goal should still be attainable.

 

is it anything like a sbc where you have to replace the valve springs to the cam and what type of cam should i run.would like to get a choppy idle