This past weekend I took a standard rack out of a 77 and replaced the power rack
on a 76. I believe both were previously untouched to look at them. The power
rack was a two bolt and the manual was a three bolt. The provisions were there
were there on both cars to go either way. I believe three bolts is overkill, but I
used them anyway. I could take pic's if anyone wanted to see, as both motors
are out of the cars at this point.
Bill