408 Build help

cast crank is good for 400hp no problem. probably at around 500hp is when you should be forged.

i'd get what you got to a machine shop. they can actually measure the comp ratio and help you get it to where you need. alum heads would be great for $1500 but you could probably get away with not using them. especially since the pistons have a dish to them.

that is the best advice i could give without measuring stuff. there are calculators on the silvolite pistons website, but again you need a lot of measurements.

measure twice cut once. carpenters do it, machinists do it. they have all the stuff to measure anything and they know what and how to measure. they will teach you any of them i've ever worked with are great people