Some other things to consider.
Installing a V8-60 in a Model A PU should produce better results than installing one in a sedan. Ford introduced the V8-60 as a "thrifty" engine but used it in cars that got increasingly heavier. Weigh is a factor of performance.
Unless you specifically want a Model A transmission, the various V8 transmissions make driving a little easier with "synchroed" downshifts to 2nd when you need them. V8-60 transmissions varied by year. Early passenger transmissions were smaller than the commercial transmissions, but in 1940 the passenger model was full size like the 85hp and the commercial V8-60.
All will "bolt-up" to the Model A torque tube with the right mix of V8 parts, like the clamshell.
One advantage, as mentioned, of the larger transmission is the availability pedal, wishbone and e-brake adapters. You lose these when you change from the Model A transmission.
Engine mounts and a rear transmission mount must be added.
If it's most performance bang for the buck, the Model A can be made to really shine. Otherwise, a V8-60 project can be a slick and beautiful sounding attention getter. Speed parts for the 60 can get mighty expensive.
