My mechanic is a pretty experienced and knowledgeabe guy. He has talked with some mustang owners in person and they have welded subframes with no problems without having the WHEELS ON the platform. Meaning lifting the car in some other fashion. Anyone disagree? I guess I'll find out. Thanks.
I did mine on my lift....Make sure the car is at least level...you see plenty of people doing the same, using lifts...mine measures within 1/8" at all 4 corners so I havent seen or noticed any issue's...