Couple of things:
Easiest way to get the engine in the car:
'67-72 A-Body Products
360 to a non-weighted convertor:
https://www.summitracing.com/parts/bmm-10239
Now, that will get it in there, but what are the suspension and brakes like? Drum brakes and slant torsion bars would suck with a 360 in the car.
What rear end is in the car? 7.25 peg leg will not live long back there.
Just some things to consider.
sb