Steel wheel, SBP

Oklacarcollecto said

The way it centers on the center register doesn't worry me personally. Aluminum afrermarket wheels seldom ever fit snug on the register. My concern is the fact that the outer ring on the wheel is the only place that the wheel is touching the face of the drum. I would add some custom spacers to close up the space between the inner ring of the aftermarket wheel and the brake drum.

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Sounds like a plan.
Would be best done for all 4 wheels, just a flat plate to take up the gap between the hub/drum and the inner ring on the wheel and it could be held in place and centred when fitting the wheel by locating on the studs (but not going out as far as the outer ring.

Outer diameter would be less than the outer ring.
Inner diameter would be large enough to locate over the register.
As thick as is the difference between the two rings mounting surface.
Drilled with the 5 on 4 bolt pattern.