So within the next month I plan on making the plunge into EFI for my big block. Was really interested in FiTech go port until they wouldn't answer my emails, messages on Facebook, or calls. I have read receipts that I happened to check due to a sensitive email and noticed they had opened it. It rubbed me wrong, so I'll take my money elsewhere. I have a big block I'm wanting to convert over to mpfi. Has anyone had any experience with the edelbrock proflo XT set up? My big block makes around 650hp at the flywheel, 540 at the wheel. I'm thinking the XT set up might give me a little more on top end with the tunnel ram style runner. I'm going with a tanks ink fuel pump pa-6, return style regulator in the back and will be using my existing hard line. Any tips or tricks?