yes the crank registers are different, and the spline count at trans is different too so the torque convertors are different. Custom adapter like convertors are available. Funny this is the 3rd or 4th time this came up in as many weeks.
The throttle pressure linkage can be adjusted to work but since that model bell crank dangles off the back of the head and the linkage does not have fail safe free throttle return slot, I wouldn't have it.
It was changed for safety reasons. Many early a owners do ignore this.
