You'd be better off selling a 60 & buying a 62. Cheaper, quicker, way less hassle.
X 2.
You could bolt the A440F to the 2F but you'd need the plate adaptor which is the equivalent of the bellhousing, the flexplate instead of the flywheel. Crossmember would need to be mover rearward. The driveshafts are different so you'd have to go with 62 shafts or have your shafts modified. Swap tranny covers. Get a auto shifter. You'd have to mod up something at the carb for the kickdown cable. May need a little wiring to account for the neutral start switch.
Sell one of the 60s or swap for a 62.