My latest BBSHD bike is built on a Diamondback El Oso Gordo I found used on facebook.
It has a steel frame an english threaded bottom bracket. Not sure on the exact size but I was able to mount a 100mm BBSHD without the aluminum BBSHD outer lock ring. There is not enough room for it. So I am keeping an eye on tightness. so far so good.
Will post pictures soon.