Well, I got about 3/4 of the heads cut off the rivets on the front crossmember when my cheapo air (Harbor Freight or Northern) hammer died. I switched to my even cheaper back up, and it was more of a "vibrator" than an air hammer, I think the only thing it did was work-harden the rivets. I got mad and gave up pretty quickly.

Bought an Ingersoll Rand Super Duty Model 121 "air precussive hammer" with the kit that included 6 attachments. Also bought the quick change receiver (IR 9512). (While I was at it, I bought the Lisle 41500 Pickle Fork attachment kit (can either beat them with a hammer or put them in the air hammer)--I suspect this may come in handy rebuilding the front end on the 66 GMC.)

Well, the difference between the cheap air hammer and the IR Super Duty was very significant. I thought that even if it worked as well as I hoped, I would have 15 minutes more work getting the rivets out. Not so, after 5 minutes of rivets flying around the shop, the crossmember was loose. What a difference--wish I had bought this thing when I started cutting crossmembers and spring hangers off the frame. I am *very* happy with it.


R-Bo

1959 Apache 1/2 ton Big Window, Short bed Fleetside (under reconstruction)
1966 GMC 305V6 in the family