ok... on the "cx racing" side, the motor mount bolts are in the second hole from the end...... When I did my install, I measured numerous times and intalled once. I suggest doing the same as 40+ year old cars can be a bit inconsistent. Side note, you can do the install with the passenger header on if you mount the whole motor mount assembly on both sides loosely then tighten it all down once once it all lines up. Helps to have some buddies involved too... Good luck. Jim