[455Grandville]

Originally Posted by Mr. P-Body

Do you have the Lucas or the Roosamaster pump? An '80 model SHOULD be the Lucas. The Lucas is MUCH better and more dependable.

I wouldn't turn the wick up too high on this one, though. The crank/rods/block combo isn't the strongest one I've ever seen... A small turbo might be the ticket.

Lucas; however its a 1984 replacement block, I think in 81 they started drilling and tapping the main bolts deeper and this solved the caps moving (and breaking cranks)
Every 5.7 crank Ive seen was cast .
Somewhere along the lines they went to larger headbolts also.

Originally Posted by RAIV55

Another vote to go easy on that one. Crank and block failures were common with those. Cams (pre-rollers) and heads/ head gaskets also were weak spots too. By '82 GM cured most of the issues but then they couldn't give 'em away.

I think I better NOT turn it up, I was considering 10% which is usually 10 % more power. Ive heard the later ones were decent motors, but youre correct by 82 people wouldnt touch 'em and gas prices were back to normal.