Will all 67-76 Abody drivetrains swap?

727 are all 1 length,so the driveshaft from your 8 3/4 with 727 barracuda driveshaft will work with the 440/727 combo...i would swap in the whole K frame/engine from the 74..if its a original v8 k frame in the 74 it will have the spool mounts, which are fail safe compared to the early ones..