Thanks for the info. I was hoping to make my first hits with nitrous this year but ended up in the hospital July 23rd and still not over it. According to my piston manufacture I was going to be limited to around a 250 MAX hit on my old NA pistons. That would have allowed me to get my feet wet some but now i'm just aiming for next year. I have the rods and pistons and will be sending my Calias crank out to have it resized to chevy sizes.