MIke B. I am pretty sure I could make the chevy bellhousing mate up to the clark tranny, but, the tube on the front bearing retainer is a lot larger diametter and in turn the throwout bearing. The Clark had a 14" clutch on it and the throweout bearing is quite a bit larger than the chevy one. The end of the input shaft that goes in the pilot bushing is also a lot bigger than the Chevy, so much so, I am not sure there would be any room for a pilot bushing in the end of the crank! I will get some pictures and measurements tomorrow night or Saturday. (I have the heads off my Suburban and may be pulling the engine out this weekend so, I'm not sure how much time I'll have to play with the clark tranny and how much room I will have to spread things out!)