The Ford Barn

Fibber Mcgee · 04-24-2026, 07:42 PM

I've seen the threads about using 1980s Bronco rear drums as a front drum replacement. Is there any issue with the center hole size? I read F1 drums use the hub to center the drums.
Would Ac Delco 18B33 drums work?

rich b · 04-25-2026, 06:09 AM

Hub register on the Bronco drums match the pilot on an F-1 hub.

Fibber Mcgee · 04-25-2026, 07:38 AM

Thanks. Seems like the best alternative to finding F1 drums. Mine are right at .060 over.

petehoovie · 04-25-2026, 10:24 AM

Quote:

Originally Posted by rich b

Hub register on the Bronco drums match the pilot on an F-1 hub.

ClutchDumpinDan · 04-30-2026, 02:53 PM

Oh wow, first I've heard of this. Is it a direct swap? Hard to find anyone to turn drums around me anymore.

rich b · 04-30-2026, 04:04 PM

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Quote:

Originally Posted by ClutchDumpinDan

Oh wow, first I've heard of this. Is it a direct swap? Hard to find anyone to turn drums around me anymore.

Yes, they are.

80 Bronco [U]rear[U] is a good application to use.

Being "flat faced" they differ in appearance from the originals; but once a wheel is on, it isn't seen.

Initial anchor pin adjustment has to be done differently due to the lack of feeler gauge slots; but drums with slots haven't been made in forever.

If you come across full cast iron F-1 repop drums, be aware that they are known for casting shift and uneven balance.

Talking F-1 front drums above.

F-1 rears are still available in the regular automotive market.

04-24-2026, 07:42 PM	#1
Fibber Mcgee Senior Member Join Date: Oct 2010 Location: Callahan Fla Posts: 1,152	1949 F1 drum swap I've seen the threads about using 1980s Bronco rear drums as a front drum replacement. Is there any issue with the center hole size? I read F1 drums use the hub to center the drums. Would Ac Delco 18B33 drums work? __________________ Wanted, a car with a " Dynaflex Superflowing Unijet Turbovasculator which is Syncromeshed to the Multicoil Hydrotensioned Dual vacuum Dynomometer. "

04-25-2026, 07:38 AM	#3
Fibber Mcgee Senior Member Join Date: Oct 2010 Location: Callahan Fla Posts: 1,152	Re: 1949 F1 drum swap Thanks. Seems like the best alternative to finding F1 drums. Mine are right at .060 over. __________________ Wanted, a car with a " Dynaflex Superflowing Unijet Turbovasculator which is Syncromeshed to the Multicoil Hydrotensioned Dual vacuum Dynomometer. "

04-30-2026, 02:53 PM	#5
ClutchDumpinDan Junior Member Join Date: Apr 2026 Location: Fredericksburg VA Posts: 9	Re: 1949 F1 drum swap Oh wow, first I've heard of this. Is it a direct swap? Hard to find anyone to turn drums around me anymore.