If it were me I'd heat just the rivet to cherry red and re-buck it, this shouldn't effect the frame.

Big Flats Rivets in NY sells the set tool that works on a air chisel...back it up with a big sledge hammer and see if you can tighten them up one at a time.

http://bigflatsrivet.com/tools.html

Mike B smile


Mike Boteler

1956 Chevy 3100 Resto Rod
1952 Willys M38 Army Jeep
1983 Jeep CJ7 Laredo
1984 Jeep CJ7
+++++
Silver Spring, MD