I picked a set of "J" heads off a 1971 360 on an old cop car sitting in the junkyard back about 1982 and it had .202 intake valves.
The motor had so much grease on it, I would bet it never was apart.
THIS is why i was asking. i used a set of J heads off an early 71 360 on my last 360 build and i didnt even bother to check what size intake valves were in it "assuming" that all j heads were 1.88