Around 1986 we got a bit more serious with my '71 340 Cuda street/strip car and installed 4.30's, 4200 stall and a manual v-body (no brake) in the 727, standard shift pattern with factory slapstick, we also drilled some holes in the clutch drum I think it was, can't remember exactly......wow, that shifted real hard 1st>2nd, not quite so to 3rd, it would chirp the tyres on the road, almost hurt your neck, but I loved it, got used to it and where to have the revs to calm it a bit, best of both worlds a manual auto.