Shift kit until the stock trans lets go. Then a TEP build, whatever level trans has the 300M and 7/8" chain. I'll keep the stock, ahem, 2.86 gears. I figured I'll be doing about 108 at the 2-3 shift...
The build is looking like it'll be a 3.2 or 3.4 top swap with 1.9 roller rockers and intercooled. I have everything but an intercooler pump and injectors... I think.