I pulled my turbo that I got from the junkyard last night because it was leaking oil like a sieve. I took the compressor housing off because I needed the bolts for this other turbo, and on the inside I could see where someone had taken a grinder to it. Upon further inspection, someone had engraved a serial number, and the number 26,600 which I assume was the mileage. Looking closer, the compressor wheel was quite a bit bigger than in the original turbo. Damn, it was upgraded all this time and I didn't even know! I'm getting that bastard rebuilt. I dunno if it's the T-bird wheel or the F-40 wheel. Anyway to tell? There are a couple of numbers stamped on the wheel itself, I don't remember what they were offhand though.