3" studs for front drum hubs???

[67Charger]

I'm doing a disc conversion that uses drum hubs and need like a .642 knurl. Disc studs don't fit, the rears are .625 and slip in perfectly by hand, no good. Who is using what?

 

[1967coronet440]

Had them on mine before I switched to wilwood hubs, I want to say they are arp studs. I have the hubs listed for sale if you need them.

 

[67Charger]

Yours are the reason I am looking again. I gave up, but then I saw you had them. I already blasted mine, machined down my center register to fit Mustang rotors, and pressed new races into mine, but if no luck, yours are my next option. Nothing in the ARP catalog seems to have the right knurl. The drum studs I removed measure .643 across the knurls.

Thanks!

 

[1967coronet440]

Sorry I don’t have part numbers or anything we installed them years ago.

 

[66chargerpat]

Advance and rockauto both call for 1/2"x20 with .625' knurl. arp100-7703 is what I have for my hubs, but yet to try them. Hope they work. Pat

 

[66chargerpat]

Sorry, just when back to rockauto. the .625 are for 10" drums and .650 for 11" drums.

 

[67Charger]

...actually, that's kind of good news. I have a spare set of 10" drum brakes. I can use those hubs with the .625 studs I have, I just need to redo the other work done to the existing hubs.

 

[66chargerpat]

Also try mocking up the two different hubs to check the offset. IIRC there is about a 1/4" different in the 11" vs 10" drum hubs. Pat

 

[67Charger]

I certainly will...

 

[wyrmrider]

Left hand or Right Hand Threads ?
that's

 

[brian6pac]

All I did was found the next size bigger than .625 and went to my local machine shop tooling warehouse and bought the correct size drill bit and opened the holes up a bit, pressed them in and away I went. You can get any size drill bit
std or metric. Call ARP and talk to a tech about the interference fit to get the correct size bit.