aaaaaarrrrggggghhhhh!
bulgy trunnions are serialized AND marked with the "code 10" arsenal marking. your '74 trunnion should have those markings and will, most likely, match the numbers on the remainder of the parts from your kit.
i suspect your feed ramp is now on someone else's rifle...as all the bulgy kits i've seen come with the feed ramp already riveted to the trunnion.
i also suspect your trunnion is long gone.
hearing your tale pisses me off to no end!
rather than dick around with gucciano for 3 more years...i suggest you call k-var, order the proper trunnion...hell, i'ld by an entire new parts set!!!...and send it to troy at inrange or todd/mike at ohio rapid fire...or off to investment grade firearms for a PROPER assembly.
the job just ain't THAT tough!!
failing that, yes...cut the feed ramp locating slot in the trunnion with an end mill.
damn! can sai screw up anything else?!?!