Hi,
I have a 1985 S10 that needs drums. I ordered the Napa 440-1359 that fit ,but rubs on the backing plate. The old drums have a cast #14074862 which cross referenced to a Napa 440-1457 that looked correct, but of course did not fit (bolt pattern). These drums actually fit an Astro Van 1985 vintage. The Astro van drums and the original drums have a machined edge that fit into the backing plate to eliminate the rubbing. Is there a manufacturer out there that makes a replacement drum that actually has the machined edge for the S10 ? If anyone can help I would appreciate the help. Thanks Bob J

Cast #14074862

S10 drum with machined edge

Astro van drum that crosses with the cast # 14074862 has the machined edge but bolt pattern different will not fit S10

S10 drums new but do not have the machined edge Fit but rub the backing plate

 

Take the old drum with you to the parts store and see if they can match it.

 

try Rock Auto.com...they're pretty good @ getting you the right part for your year