Need input on my 318 build!

see thats what sucks I won't know how far down in the hole they are until I buy them. I don't want to buy them if they aren't going to work. Its a crappy situation. I think I might just go with the factory 8.5:1 pistons and mill the heads to get my compression up a little. 33x12.5x15" tires this is a truck tire