I have a 90 gt and want to upgarde pistons to forged. They have a setup to turn your 302 into a 347 and includes pistons needed to fit a 4.030 cylinder. What am i gonna have to do to fit these pistons. It also comes with a crank. Was wondering if this was a good kit. Its on ebay for lik 700. If i could get some info that would be great.

 

You'll need to machine the block and balance the assembly. For that little money, make sure it's from somebody rebutable and has a steel crank with a modern piston design (older designs tended to wear quickly and use a lot of oil due to the placement of the pin in the ring grooves).

Other places to check would be Brother Performance and Summit Racing.