Where can I get specs on an 81 350 4-bolt? I'm getting one with everything but carb, intake, dist. Id like to know the specs on the pistons and heads. Anywhere I can go to find out? Thanks for the help. Without power adders what kind of hp can I make with this stock bottom end? i want to reuse the pistons if the cr isnt too low. Thanks

 

Try to get some numbers off the block. The casting number is on the back where the trans. bolts up on the drivers side. Also the passenger side deck (front of motor where the head bolts to) will have numbers on it. These are stamped and can be hard to read but there will be two sets of numbers. A few of us have books for these numbers. We will be more help with the numbers.