I got the Total Cost Involved coil spring crossmember but if I did another one I might consider the coil-over one. Part number for coil spring one is 232-2354-00 I believe is correct. If I were flush with $$ I would be tempted to get the frame option..LOL My LS1 Gen III engine is about 1 to 1 1/2 inch forward of the stock fire wall. I'm a little tight on clearance on the frt to rad but it should work.