What specs do you want? 1969 383, punched .070, pistons Silvo-lites 1276's @ from what I'm told CR is suppose to be around 8.5, from what I just looked up it's 8.0. Now mind you that's with a 440 block. I'm not using a 440 block however. I'm using a Lo-block 383 with stock 383 crankshaft. I'm...