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rotorwrench · 03-14-2023, 06:37 PM

Ford used 1/4" rivets for most of the frame. The holes were drilled or punched to be a bit larger (17/64" on most model A frames except early 1928 frames). If there are 3/16" rivets then use a 3/16" bit but most of those are in the body framing. Use a 1/4" bit on 1/4" rivets. The big ones are in the running board support brackets. They are 5/16" diameter.

03-14-2023, 06:37 PM	#15
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,431	Re: Removing center crossmember Ford used 1/4" rivets for most of the frame. The holes were drilled or punched to be a bit larger (17/64" on most model A frames except early 1928 frames). If there are 3/16" rivets then use a 3/16" bit but most of those are in the body framing. Use a 1/4" bit on 1/4" rivets. The big ones are in the running board support brackets. They are 5/16" diameter.