What exactly are you trying to find out here? Pros and cons? Racing rules?
I’ve got a QuickTime bellhousing to mount up my T56 magnum, has a block saver with bolts.
I will say that the block saver plate made dropping the oil pan with the engine in the car quite a bit harder, because there was no room to do anything other than go straight down with the pan until it was well past the bell.
