Before you spend too much more dough check this out. I recently bought a new m/c and I ordered the vette style double bail w/o bleeders. Point is when it came I figured it would come with the adapter if it was a deep bore. It didn't to my disappointment. But then I got to looking at the end of the pushrod from the booster and it has a bump around the end of it large enough to not to allow the rod to extend into the bore any further than the shallow bore master did. Take a real good look. You might be ok with what you have afterall.