#63936

I wouldn’t think a 5 bolt bellhousing would fit to a 6 bolt block, or the other way round. 6 bolt used a slightly larger flywheel and the flange around the back of the block followed a larger "circle" due to this. So the 5 bolt bell wouldn’t be as wide and possibly cause fouling problems with the flywheel and clutch as well as not matching the block’s mounting curve.