Darren at ProTrans built my buddies A518 for his '66 Coronet, needed quite a bit of work to the tunnel and floor to get it in.
He has a 470" motor, bottom 11's on motor, low 10s on juice, his has a lockup convertor.
I have a GV in my '70 Cuda, only had to trim the trans crossmember some and put a few dents in the floorboard to get it in.


1970 'Cuda,Lime Light,499 Indy S/R's 10.70's @125,street driven ALOT!
1966 Barracuda 360,now a 5spd,Hemi Orange,Hot Rod Air,
New daily driver-2003 Ram 2500 Cummins 5.9
'69 Valiant 2-dr, sleeper!
New project---1938 Dodge truck, plan is a 360 with a A500, AC, Calvert rear susp., rack and pinion front with coils.