Running twin turbos is cool and it will make lots of power. I hope you have a plan for getting that power to the ground. The stock trans, suspension and tires can't handle the power the 455 already makes. Making more power means you'll spin the tires faster and longer without getting any traction. If you want to build a sleeper I would recommend you work on the rear suspension first. Get the car to launch hard and straight with the power you have. The first step is finding a posi axle. These are hard to find but it will double the amount of rubber being used to push the car. There is a lot of room in the rear wheelwells but you'll need rims with the right offset to fill them up. A heavy swaybar and an airbag for the right spring will help. It will still take a lot of practice to launch the car consistantly. Once you have that down, you can begin dialing in the transmission. A bit higher stall, stronger shifts setting the shift points where you need them etc. You'll have lots of power trying to shove lots of weight. Everything in the driveline has to be able to withstand the punishment. You might want to do some research and determine if twin turbos are the best solution for your driving habits and budget. Nitrous is an option as is running a single turbo. There's some guys on this board who make these barges fly. Study what they've read and ask lots of questions. Good luck and let us know how you progress, John
incased i missed it somewhere is the OP trying to run rear mount turbos??? Ive seen a couple times where full lenth 3in headers are mentioned...so im confused Some log style manifolds like Burton makes or some custom manifolds are the way to go.
