I don't have any experience with a true coil over up front but i have had a set of the QA1 Procoils on my 65 chevelle. I ordered the "small block" spring as my car at that time was essentially stock in regard to weight, small block, cast iron heads, aluminum intake, etc. Once assembled and with the adjuster run all the way up to the top (as in could not raise the front of the car another half inch) the car finally sat high enough to get the jack out from under the crossmember. Mind you the springs were almost completely into bind and honestly the car sat TOO low (and I like LOW). After speaking with QA1 it was decided that I needed a heavier spring. So the moral of this story is weigh the front of your car and figure out exactly what spring you're going to need. Don't trust application guides.
Last edited by Inprogress65; 05-20-2012 at 08:15 PM.