[Keithc8]

I think this is a matter of how much power do you want and where do you want it to be. Also if you go bigger than 4.250 stroke on the crankshaft you will have to go billet which you may plan on doing anyway. I have built them in all the C.I. you listed and have not had anyone disappointed yet. The big bore blocks are 500.00 more and they do have special sleeved installed so the sleeves are not thin and we have seen no running hot problems which i think concerned some people. We have all the parts in stock to build any of the above com binations. Let me know if we can help. Thanks, Keith Craft