Technical redrilling 5 on 5.5 to 5 on 4.

I think I can do it...

 

How about the inner side of the hub?

 

It looks like it's going to be close.

 

Getting the bolt pattern centered is the tricky part. Do you have a mill?

 

What the heck is 5 on 4 ?

 

My thought also. What uses a bolt pattern that small?

 

Those are Mopar A Body wheels. They used the 5X4" from 1963 to 1972. Those small bolt pattern are pretty sought after. You would probably be wise to sell them and find what you want in the size and bolt pattern you need. That small bolt pattern used either 13" or 14" wheels, so they might not even clear big drums. What size are these wheels. The A Body Forum would be a good place to sell them. FORABODIESONLY.

 

The Mopar A body is the 63-72 Valiant, 64-69 Barracuda, 63-72 Dodge Dart, and the 70-72 Plymouth Duster.

 

Lemondana is 100 percent correct, great advice

 

I do it in a manual mill, with a DRO and an electronic probe, all of the time.

 

If you redrill them and find they don't work for you, no Mopar guy will want them, rendering them useless. And it's very doubtful that they fit over disc brakes with the 5.5 pattern or the bigger drums that you probably have.

 

And the center register is smaller than most other hubs.

 

Finding 15x4" slotted mags is getting harder, I've been looking for some time now. I've found 3 sets with 5 on 4" small Mopar pattern. (and some chevy patterns) but no 5 on 5 1/2"
EDIT: not running any brakes, so clearance won't be an issue. (going on an Altered)
anyway, I figure I have 3 options,
1. Buy aftermarket hubs with correct bolt pattern.
2. Re-drill hubs bolt pattern and decrease size of hub for wheel center. 3.125 to 3.00"
3. Re-drill wheels bolt pattern and fill in existing holes.

There is an area on back of wheels that will accept 5 on 5 1/2" holes, but will be very close to existing holes.

I'm leaning towards re-drilling hubs and using screw-in 1/2 x 20 studs. (either double ended or Allen head) BUT, hubs don't have alot of material between bearing races either.

 

With out seeing Hub , thats more likely
What I would do , re-drill hub's.
Or Slot wheel /Rim
I remember in early 70s seeing oblong holes , I allways told Unilug / slots?

Double studs , I would use a High grade studs instead of whats shown , ARP etc.
On my Altered over 200 ,
Spindle mounted ,

 

Make sore your center of hub will fit through the wheel . What I found ( too late ) is that the ford hub is too large for most aluminum rims that aren’t made for the larger pattern

 

Printed 2 of these. After verifying no distortion happened during printing, I'll be glueing to hubs.
note: this includes "5 on 4-inch pattern" which almost none of the bolt pattern templates do.