I'm new to posting on this board, but have been reading it for over five years, so please don't mistake my newbie status for lack of knowledge. I worked at Incon Systems from the prototype phase, through production, all the way 'til they closed their doors. This was the most highly-regarded twin turbo kit for 5.0's and 4.6's ever built, so I have some good background in turbo 5.0's. Your build is a massive undertaking, and I'm sure has taxed your time and wallet accordingly. As such, I can understand you making some compromises in your design, but I'd like to make a couple of suggestions, if not for you, for your readers. I have much respect for your build, I just want to interject. 1. An intercooler would dramatically lower your intake air temp, reduce detonation, and might save your head gaskets. 2. A proper tune is equally as important, as I think you already know. The best way to control the fuel on these motors is to re-calibrate the MAS. 3. Bump your initial timing back a couple of degrees from stock. 4. Your injectors are quite large. You'd find better driveability and more tunability with 32's. 5. You are definitely exceeding the limits of the stock block with your power goals. Unless you want to grenade it, I'd recommend limiting your boost to ~ 7 lbs. These blocks and bottom ends are good for about 450 hp, 500 is pushing it, and you're already over that number. Again, I'm just trying to give some input to this already impressive build. I'd like to see you drive it without breaking stuff and plowing through headgaskets. At 450-500 hp, you'll have one of the most powerful, streetable, reliable Starquests on the planet. Call it good enough and focus on the reliable part. I might be preaching to the choir here, but when I started working at Incon, my boss gave me a copy of "Maximum Boost" by Corky Bell. This is the be all, end all of how-to turbo books. Everyone who tweaks Starquests, especially with custom systems like yours, should read this book. How do these cars handle with the V8 up front? I read that the weight is comparable, which surprises me, but the location of the engine would seem to effect handling/braking to some degree. Do you experience a lot of nose dive under braking or body roll in corners? I'm building a NA 5.0 Starquest of my own... your project has literally talked me out of turbos! It brought back all the bad memories and only a couple of the good ones (way more time spent wrenching than driving) I just want to drive this thing and 300-350 is good enough for me. Like I said, MUCH respect for your project. Good luck with it.