Alright, I found a set of wheels that i want. They're the right size/width/offset for both the Celica and the MX6.
The Celica is 5x100.
The MX6 is 5x114.3.
These wheels are 5x120.
Adapters are out of the question, definitely for the MX6, maybe for the Celica, since the thinnest adapters i can find are 1".
Anyone ever had a wheel re-drilled to smaller than what it started out with?
Not easily done, and not worth the trouble.
I've re-drilled wheels for race cars in the past. I used a hub from the new car as a template, and made a transfer punch to mark it. Never had a problem.
Lug centric or hub centric?
Hub centric it is easier but you still have to be very close. Lug centric you have to be spot on.
Looking at the wheel in retrospect, it doesn't look like there's really enough room to safely do this. 
Redrill the hubs to fit the wheels. Much safer.
DILYSI Dave wrote: Redrill the hubs to fit the wheels. Much safer.
I like this idea mo betta
That sounds expensive, too....
I'll look into it, though. 
This subject comes up often on the E30 forums since wheel options for the E30 are surprisingly pitiful.
It can be done properly and safely, but it's not cheap - over $100 per wheel IIRC. Only worth the effort if there is a wheel design you're really in love with.
I believe the procedure is to weld-fill the existing holes and redrill on a CNC (or std) mill where the dimensions can be exact. They can re-dimension the hubcentric if needed. No real DIY option if you don't have the tools and experience.
Some hubs could probably be drilled in between the existing holes, avoiding the need to weld-fill the holes.
Drill the hubs.
Look at the wheels, see those bumps and ridges, the little volcano thingies around each lug hole? Structural integrity. Going fender to fender too hot into turn 5 is a bad time to find out you're not an engineer. Be safe.
These are Celica wheels.
914Driver wrote: Going fender to fender too hot into turn 5 is a bad time to find out you're not an engineer. Be safe.
What he said ^. I'm not an engineer, but it would seem logical that if a wheel is designed to be lightweight, the metal that is there - is there for a reason. I wouldn't be removing big additional hunks of the center of the wheel. I've seen enough wheel failures of un-modified wheels.
Have you asked for a quote from these guys:
http://wheeladapter.com
NFI, etc.
Carter
DILYSI Dave wrote: Redrill the hubs to fit the wheels. Much safer.
You'll want to look at the hubs first, though: some hubs are thicker behind the stud/lug hole, and thinner in between the holes, to the extent that you probably wouldn't want to drill there (see pic below). Can you fill the existing holes and re-drill? I dunno...
A guy on e30tech had a set of E38 wheels redrilled to fit his car. He paid $45 each, which seems pretty cheap...
http://www.e30tech.com/forum/showthread.php?t=73483
Naturally, there is a doomsayer telling him they will fail and kill him, but BMW OEM wheels tend to be on the over-built side, so it's probably fine... an aftermarket wheel, on the other hand... who knows...
Redrilled wheels, and you get in an accident, without the company that redrilled the wheel having liability insurance on the wheels, ha, ha, ha, ha, ha, ha, ha, ha,
The lawyers and the insurance company will own you and your house....
And with a guarantee, Ramen noodles forever paying off the lawyerS.
Track usage only? Probably depends on the tech inspector.
It's cool, i found something that actually fit.
They aren't QUITE as cool as what i showed above, but close. 
I redrilled the rear hubs on my aries from 5x100 to 5x114.3. The fronts i was able to swap with oem stuff.
Anyway, because of the uneven surface on the back of the hub like in the pic above, the studs dont stand up or line up straight, but i use a hubcentric ring and once everything is tightened down its smooth to 100+mph. So i also think redrilling the hubs is probably better. Plus on the rotors you probably could just slot the holes rather than drill 5 new ones.. saves some effort.
Although, i am going to slot some holes from 5x114.3 to 5x100 on a set of wheels i have. BUT the surface the lugs grab and the design of the lugs allows it far better than most wheels. And it will still be hubcentric. I wouldnt dare try any of this crap on lug-centric.
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