well, my Type A's came in. I'm not so happy and will continue the hunt. Here's my write-up from BadWeb:
The thread we were discussing this went into archive land, you can find the original here: Gauge Cluster Overlay
To continue the discussion, I finally received my LED Type A's from superlumination.com and had a little time at lunch to investigate. As I had assumed, I'm not really into the way they fit. Sure you can screw them in, and they do work but the clearance is super-super tight which caused the LED to be very bright in one spot.
To help others investigating this mod, I took a snap and made some measurements of the stock bulbs vs. the LED Type A. Here's what I found out.
My next plan of attack was to remove the LED bulb and use my stock neowedge base, but that didnt go so well. Upon attempting to gently remove the LED, first straightening the leads out, it broke away, ruining the bulb. Ooops. Very fragile.
I'm going to contact Superlumination.com today and send them this pic, see what they say.
The only positive, the light emitting from the LED was very crisp and clean, just not focused correctly because of its height. At least for my standards. I'm sure some would be fine with overly bright spots but I know it would continue to bug me.