I have one of these if anyone wants it. Bellhousing adapter and crankshaft adapter. I started with a new 4L60E bellhousing (since you can purchase them separatly new from GM) and had my machinist guy build a 1" thick aluminum plate that's welded to the front 2" or so of the 4l60E housing. Then had him make a 3 peice crank adapter that bolts over the top of the 4200 flexplate and allows regular V8 flywheels to bolt to. It cost me $2500, materials weren't too bad, it's the $80/hr that's the killer. efi-diy if you want, I could send it your way for you to look at, or make patterns from if you like. It's not the prettiest welding job, but the machine work is top notch. I don't have the plans any longer. They were mostly hand drawings with dimensions scribbled on where needed. -Chuck monte_327 at hotmail dot com
