Ok, firstoff I am not 100% sure of the background on my engine, so I was ORIGINALLY planning on going with a full rebuild. The funds arent coming in like I wanted, so now I am just looking at a head/supercharger swap.

After doing a lot of research , I think I am running close to a 10:1 compression ratio with my double valve relief pistons, and heads with a 60cc chamber (small 1.72 /1.5 valves). C:Ratio is my main concern considering boost.

The engine is a 327 (supposedly .030 over). Small journal , forged 3.25" crank with 5.7" forged rods.

If I go to a 75cc chamber , I am guessing I will be in the 8.5 to 8.75" C:R area? (now it should be close to 10:1)

I am interested in the AFR 195 intake , 75cc chamber , Eliminator aluminum heads. Right now I am running the L79 .447 .447 222 222 114lsa cam.

Is this the right set of heads I should run if I want to just bolt up my 142 blower/head combo?

If I am missing info , please ask away. This will be hooked to a th400 and then to a 10 bolt with 4.10's. What type of STALL do you recommend I run? I have a "clueless" stall right now and would like to swap it out while I am at it.

Also these ELIMINATOR heads come with 3/8 rocker studs and I have 1.6 pro comp mag rockers in the 7/16 stud range. How hard is it to swap out the studs? If the heads dont get the C:R down enough, do you recommend just using THICK head gaskets; or should I be fine!?

THANKS GUYS!!! ---

 

the heads ar alright. the camshaft sucks big time though. that is an antique. i ran the same cam and gained .7seconds by swapping to a comp 270.(better idle more power.better mileage) tyou can get studs with the smaller bottoms and larger 7/16 tops. easy to swap
get a cam more exhaust duration and lift to compliment the blower. stay around 215 to 230 duration and .480-.525 lift and you would be happy. for streetability i like a comp cl12-560-4

a nice 2200-2500 stall will give plenty of kick.
the 142 doesn't push a lot of boost so the compression could be a little higher. i would stay at 9:1 or lower. the more compression the lower the boost. if you want to crank it get the comp. lower. that blower will run out of steam at about 10lbs on that setup before you overheat the air.