I don't know of any crank girdle that reinforced the main webbing It is the main webbing between the bottom of the cylinder walls and the main bearing bores that fails on the RB,440, blocks, not the oil pan rails or main webbing ribs from the oil pan rails The girdles can't fix that, new better race block do that well
The girdle will keep the main caps from moving around which I would think would put less stress on the webbing ribs. Tying everything together, pan rail, main caps plus a half fill on the block should stiffen things up. But, your still working with a 50 year old block.
it's ok to butt heads, just don't do it with a butthead
