I still have 4 Mustangs. The 2017 'Vert has about 10K miles on it now and the wife wants to keep that one for road trips. The '84 T-Roof will probably go up for sale this spring. The '64-1/2 is still sitting in the CONEX where it has been for the past 20 years. So, that leaves me the '65 coupe...
Ford still makes all 3 roller cams that were so popular back in the 5.0's days of glory.
My own 5.0 has an Isky roller cam that's a little hotter than the stock 5.0 HO camshaft that has a ton of torque.
Ford made a transmission in 77-78 that externally looks just like a top-loader but is actually a 3 speed with its 4th gear being an OD. I wonder if that would work? If so, here are some tag numbers:
RUG BP
RUG CA
RUG CD
RUG CL