Persistance pays, sort of. Think I've answered my own question when I found:

https://www.stovebolt.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=552544&page=2

Out comes the cutoff wheel.



'69 1/2T stepside, Sea Foam Green, 250 L6 w/ 3 on the tree, not an option on it, in the family since new.