The fronts don't hit the frame rails as I am running 1" spacers and +15mm enkei rpf1 rims with a 245/45/r18 tire.(I'm also running 2" drop spindles from magnumforce and I have my hotchkis adjustable strut rods maxed out for the most caster, I'm also running hotchkis UCA's, Running a big block setup with hedman 78030 headers - no issues there, but I did have to chop up my headers for the mini starter when I went to the larger flywheel (11" instead of the 10.5") I am running the fast ratio pitman/idler arms.