guess my E.T!

[lilbowtie]

You are going to have at least 5% slippage and that cam needs to shift before 6000 - leave the 4.11s in. Those heads would like to see a little more RPM to breath. I'm running a stock block 1980 350 (L-82)
with worked on 2.02 chevy iron heads (close to 187cc) coms cam 306s w/ Vic Jr and a 750 - T-400 w/ 4000stall 4.30 rear w/ 28 tires. Runs 11.20's @ 115mph

 

[Myles]

You are going to have at least 5% slippage and that cam needs to shift before 6000 - leave the 4.11s in. Those heads would like to see a little more RPM to breath. I'm running a stock block 1980 350 (L-82)
with worked on 2.02 chevy iron heads (close to 187cc) coms cam 306s w/ Vic Jr and a 750 - T-400 w/ 4000stall 4.30 rear w/ 28 tires. Runs 11.20's @ 115mph

Cool,

What are your shift and trap rpms?

 

[lilbowtie]

6200 - Another thing I want you to do your home work on is Drive Shaft Critical rpm - I found out the hard way.

http://pstds.com/critical-speed-chart/

 

[Myles]

Yes I'm still studying driveshafts. Some people say a larger diameter is required the faster you want to spin it?

No sure yet what to get or where to go for one
Th350 and diff is a 70s chevelle 12 bolt stock yoke where driveshaft would go