Just got back from my shopping trip. I asked for seals for an '87 Camaro 305 TPI and brought along one of each seals for comparison. Here's what I got:
Had absolutely nothing that resembled the seals that I had.
Informed me that the seals on the truck are actually high performance. Asked if the umbrella seals they had in stock would work and and was told yes, as long as it wasn't a high performance engine. Bought a set of Seal Power MV-1598C.
Also had nothing that matched, but was offered positive stop intake and exhaust valve stem sets with o-rings from Felpro and was told they should work.
Will any of these work?
Picture #6 for the Felpro exhaust seal (side view)