My last SBC build I did for my Blazer toasted the trans and diff in short order. Heavy rigs. It is the only 12 bolt diff I ever detroyed The TH400 got replaced with a TH350. Damn I miss that Blazer. It is in my long list of regretted sales. I foolishly traded it for a 85 1500 with a 6" lift and 35s...with a 305 I was young and dumb and wanted a Silverado with all the bells and whistles. What a POS that truck was. Looking forward to your progress!
Yeah, I have a B&M trans, With the upgraded baskets and shafts. Its a TH350. It has 12bolts now, Probably going to need some work. The previous engine was a 468, and used up the life in the drive shafts and axle's .... I will be going through the axles too.
I don't know alot about heads and high compression pistons. But i will be running a .200 dome... Will that be ok to run on 64cc heads? I'm thinking about biting the bullet and going for a set of pro comp aluminum heads. They are 205cc runners and 64cc combustion chamber. That would get my compression ratio right at 13:1....
Yeah, depending on your deck height and what head gasket you used you could be even higher than 13:1. I love high compression motors, but if you want to run 13:1 you will have to use race fuel or that thing will detonate like a bitch. If you want to run just premium pump gas you need to keep the compression around 10.5:1 with iron heads or you can get by with 11.5:1 with aluminum heads.
Ok, Thats good. The block has never been decked or anything. Waiting on the block from the machineshop before i actually order pistons. I'm pretty sure it will clean up without boring it again. Yeah, I run Sunoco 110... About the only stuff i can get around here. And its fairly cheap if you buy it by the barrels. And its strictly off road truck. And will probably only be ran a couple passes a race.
