So pretty much I'm fucked with this piston/head combo...?

 

A lot is going to depend on the piston. When you get them, let us know their specs. A lot of manufacturers advertise 11.5-1 but when it comes time for the final assembly, you end up with less. You also have to take into consideration if the block has been decked, how much the piston is in the hole, etc.

 

Alright, I'll be happy to give ya the exact specs when I get the pistons. The block isn't decked as far as I know, and any other specs that I haven't given and you need if you could just tell me what they are and I'll find them out? Really appriciate the help, I'd hate to put together a 5,000 dollar engine only to have it blow up on me.