Okay so after a lot of research and forgetting to mention a detail I think I'm gonna use a 75mm for my small side and a 95mm for the large side. The detail I forgot to mention is when funds allow (aka tax return lol) I want to buy an aftermarket block with a bore of 4.5" instead of the normal 4.25". With the stock deck Height of 9.8" it will up my engine size at a very nice 509 cid or 8.3L which is why the turbo size changed a little