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Rear drum brakes

1K views 10 replies 4 participants last post by  vht 
#1 ·
I have a 78 ford truck 9 inch for my 28 A sedan I'm building. I cut 1 side and narrowed it to center the pinion, added aftermarket axles, 31 spline with a 4.5 BP. They have the 2.78 center, drum size is 11x2 1/4. I'm trying to find a drum to fit, does anyone know the measurement on the back spacing outer edge to hub area on a 1/2 ton ford truck drum? I could buy truck drums and drill for 4.5 but the center hole will be bigger. Speedway has this size drum with the right bolt pattern but they said it wouldn't work with the size axle bearing I have. Measurement on BS on it is 3.575. Any ideas?
 
#11 ·
I've looked up about every drum for a ford you can think of. I think I'll just drill a 4.5 pattern in 2 new truck drums. I'll see if I can get some pieces made to go over the center of the axle with a OD of the center hole on the drum.
 
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