I have heaps of cracked ones here,,, i`ve repaired plenty of these over the years & some are still going strong,,, but some others died miserably pretty early in the piece
years ago there was a big mad rush on 163 heads cause the appendix-J rules started changing to "MAKE" you use a 163 head , so i went out looking for as many as i could find & started repairing them all,,, Brian Brooks also did the same & we made some pretty decent repairs back then,,, but then the J rules relaxed once again to let people use 940 heads (again) so i now have a big pile of cracked 163 heads sitting here
