Couple years ago I popped the bottom end of my 6bolt and swapped in a 1g 7bolt shortblock. Figured it wasn't prone to cw and no one wanted to touch it because it was a 7bolt. Win win. After the swap it ran PERFECT and was awesome to drive. About 900 miles into it, the clutch would get a little soft around left turns, idle would bog hard at red lights for no reason. I remember driving in denial for a few hundred miles before accepting that it walked and had to be ripped out. The crank had like 1/4" play side to side. Personally I will never touch a 7 bolt again just because of all the wasted effort and time. I have no hate for 7bolts and if I bought a car that already had one I would leave it be, but for swapping, never again.
As for the swap itself, I'm trying to think of what was different. It was minor stuff. I had to drill out the head for the larger headstuds. My 7bolt was out of a FWD because the front/rear motor mounts were wrong, so that meant I had to modify the starter plate for an AWD flywheel. Had to get 1 flywheel bolt and 7 bolt flywheel obviously. The oil pump and front case is different, the tensioner is different, oil pan is different. I had to cut up my 6 bolt timing belt cover to clear everything. I should have used a 7bolt timing cover to properly set my ignition timing. I'm sure there's other little things I'm forgetting.
If you need any 1g 7bolt accessories let me know. My walked block went to the scrap yard but I kept all the accessories.
