1971 Dart Swinger

Its great to see someone else looking at the power of turbos for our A-bodies! I'm looking forward to seeing your build progress.

Not be be a downer, but I think a T70 will prove to be WAY too big a turbo for your 318, given your 500 hp goal, especially since you don't plan to freshen the motor. Not sure if you have forged or cast crank/rods/pistons, but a cast rotating assembly won't hold up to the turbo at more than a couple of lbs of boost. At least the low boost means you won't need to run an intercooler. Tuning can also be a b*tch for a turbo running with a carb. It can be done, but its not as easy as with fuel injection. I strongly suggest a shift kit for your transmission, otherwise it will be toast when the turbo kicks in.

I'm also running a T70 turbo, mine coming from Garrett. The block has all forged internals, and includes a main stud girdle to hold it all together. 8.5:1 compression pistons, and I'm installing F.A.S.T. XFI fuel injection. The plan is for running 8-10 lbs. of boost on the street, with the ability to crank it to 15 lbs. at the track.

I'll be watching as your car comes together. Good luck!