Ok so this past weekend my good friend Pete "lucky" Luciano of Lucky's Race Cars in Phoenixville, PA,, machined the bearings down. The gmc bearings are now narrow enough to clear the crank radius. Narrower than stock gmc but wider than stock 235/261. Probably did not need to narrow them as much as I did but I wanted to make sure I had more than enough clearance Installed the bearings on Sunday and no more problems. Rotating assembly actually rotates now, lol. So I think the gmc swap goes like this: early gmc rods with.990 pins and 1/4 inch bearing tang, big end narrowed to 235/216 dimension. Slightly narrowed rod bearings. The testy part is you need custom pistons with the pin moved to compensate for the longer rod. I have a couple of pictures is beater would be nice enough to post for me.
