okay. the best info i can give about the compression ratio and the pistons is that the block was built by ford strokers.com. i just visited the web site. it says that flat top pistons yield a 10:1 compression ratio on a 331 and dish top pistons make it a little lower. i believe i have dish top pistons (the ones that have the top of the pistons cut out a little and its shaped like a valve) i guess the next step really is to determine the cost. i would like to boost it and if that means changing the cam that is fine. does anyone know where i can get a 6 psi supercharger for less than 3,000? i dont wasnt one thats junk, but it might be nice to spend a little less. vortech has a kit for 3,000 but i think it comes with injectors and a fuel management unit, plus all the pulleys and everything to install.