Quote Originally Posted by peterh226 View Post

The suspension mount holes continue to be a continuing source of confusion (at least to me).
From a Gen 2 33 suspension thread (https://thefactoryfiveforum.com/show...272#post376272), Jim Schenck had the following to say about the upper and lower holes....

The coupe and 818 have a street height set of holes and a low/race height set of holes an inch higher on the chassis. The truck and 33 have a standard height set of holes and a tall ride height set that are just under an inch lower. We added the holes on the 33/truck to help with extra clearance on the full fenders or if someone wants to add extra rake or run taller rear tires they can put just the back at the higher height.

The key for all the cars is the higher holes equals lower ride height and lower holes equals higher ride height, which is not always intuitive with the chassis on jackstands.