Cab having to clearance a rod or bolt is not unusual at all. It is common practice on many engine combos done by big name race engine shops everyday, it is nothing out of the norm. Guess those names most know are just backyard hacks too I would also suggest especially for the combo you are building to remove all but #1 and degree the cam in and recheck. You may be ok then but maybe not. If you have to clearance the rods a bit it is not a big deal