Just an idea, LMK your thoughts.
On TD, Tryingbe suggested a forum member to purchase an 88 TBI cam 04387850 these are NOS. So I thought sure why not, so I bought two.
It is generally accepted that there is no unique identifier on these cams to determine which is which. I have noticed that both of my NOS 04387850 have a orange paint mark between the intake and exhaust lobes on cylinder #1. I have noticed in passing others on my shelf that have a white paint mark...humm
Could this a unique identifier we are looking for? Unlikely but I could not help but ask