I would highly recommend Brian @ adperformance.com. Read my story.
More than a year ago I bought a 393w stroker kit from him. Somewhere between our many phone conversations and emails with him helping me out on my build, .040 pistons were ordered and shipped instead of .030 pistons. Due to some personal issues, I was unable to start the build until a few weeks ago. Once I found that I had the wrong pistons, I called Brian for help. Brian swapped out the pistons and now I am good to go. The man did not have to do what he did and most would not. Brain will get the first shot at any new parts that are bought in the furture from me. Give him a call. Again like most in this buisness, he is very buisy so be patient and he will get back with you.