Wheel Options for `61-`63

[UGW]

I've been searching this a while, across various sources. My car has some very nice original wheel covers, but I don't want to lose any, and I've always liked wheels better. I'm not trying to do anything extreme like a donk, lowrider, or pro-touring; just something with a late-60s, early-70s custom vibe.

How have you guys found something that would fit, especially with the stock drum brakes? Here's what I know:
- Bolt pattern is 5 x 5.5
- Studs are 9/16" (not the more common 1/2)
- Hub bore is "big"
- Stock wheels are 15x6
- Current tires are 235/75/15

Questions:
- Most online shops either don't have Imperial at all, or list a 5 x 4.5", which is definitely wrong
- Is there some more common vehicle I can use as an equivalent?
- It seems like older Rams or Ford F150 might be the same, but I'm not sure about the hub size?
- Thoughts on the widest tire or wheel I can run without modification? (15x6 doesn't have a lot of options)
- Backspacing? I don't even know what I should be looking for

I like the Rocket Igniter, (reminds me of the original Batmobile) but since Holley bought them, they might be discontinued? It's hard to find much of anything in 5 x 5.5".

 

[CBODY67]

That particular bolt pattern is more like "pickup trucks" than cars. Might end up with a GM pickup truck type wheel. I never had been concerned with Ford pickup truck bolt patterns.

In the later 1970s, there was a common Chevy pickup truck Rally wheel that looks similar to the Chrysler 1970 W23 wheel, except it has a center cap that attaches from the outside. There are now aftermarket versions of it. By that time, Chevy C10s were all 5-lug wheels, just not sure about the bolt pattern. They were all 15x8s, although some normal 15x7s were built with the car bolt pattern for Caprices and such.

In the normal 15x7 5x4.5 world, a 4.0" or 4.25" backspacing works.

Just some thoughts,
CBODY67