Well the good thing is you haven't built it yet so you can buy the parts you need to get things right. I don't know what you plan on using for pistons but you should contact one of the board members that is a Diamond WD to choose which piston you want , if it's a shelf stock piston you can go semi custom for a small up charge and get it with the pin move and possibly a small D dish to give you a pump gas friendly compression ratio and take advantage of SQUISH