Ok guys, Before you start flaming me up over my username, I am an avid fan of multiple cars, preference is Nissan but I am now in the game to get a Regal, and boost it up. The Fiance is going to be getting a new car and buying two new cars is out of the question, so I have decided that since I do not get to get my Charger RT, I will be buying and building up a Regal. I currently have a 1990 Nissan 300ZX that I have built up and converted from Automatic to 5spd, and have a 1977 Datsun 280Z, custom turbo build with custom turbo downpipe, custom exhaust manifold, and custom intake manifold with a custom fuel rail, so I am definitely not afraid of work. I have been studying for several hours and cannot find any answers to some of my questions, is there a FAQ on here that I am just not seeing? Im trying to discover if all the 3.8 blocks are the same in the 74-87? Compression ratios on turbo engines to NA, are the heads the exact same? These questions I just cannot seem to find by google searching. I have also noticed that no where sells crate 3.8 turbos. So any help to get my ball rolling would be greatly appreciated.