You have a welder and a local metal supply company?
If so, go to the junkyard, grab a 5 speed out of a Foxbody Mustang, get the adapter kit to bolt to a small block chrysler, weld up the transmission crossmember and bolt it in. Grad the linkage and all of that off of the Mustang if you dont already have it. I say a Foxbody Mustang because they are plentiful and the transmission will hold up to 500hp/tq.
Turbo, wooohooo lets go fast. First off some of the fastest turbo cars are single turbo, you dont need twin turbos. If this car is going to be street driven I would go with a small turbo that could spin up at low rpms, generating more torque and low end power. Of course, to make it work, headers, different exhaust, intercooler, lots of things. But turbos off of the old Mopar K-cars can be had for 50 dollars, and rebuilt for as little as 300 dollars. They can also be tuned to turn 10 lbs of boost, which is more then enough for a street v-8.
