My brother-in-law has a PT61 in his car, an 82 Grand Prix powered by an LC2. His engine features a 70mm TB and doghouse, stock unported lower manifold, 208/208 cam, GN1s, forged pistons and stock bottom end. He runs a 10" converter and a TH400. He hasn't been able to make a full pass do to little gremlins (intercooler pipes blowing off, exhaust leak-plagued old Hooker headers) but went 11.44 with an intercooler pipe blowing off just past the 660ft. mark at 18psi. His car is an easy 10 second ride once the little stuff is sorted out. This turbo definately has some snot.