Sealed power, fel pro, victor reinz all will have those seals. I doubt they will still be available from Mopar, and if they were they're probably 30+ years old and brittle from being on the shelf so long. Replacing valve guide seals will have no effect on compression or aggravating worn cylinders or rings, etc. a lot of how it turns out (fresh valve job on top of old short block) actually has more to do with how well everything waa maintained prior to this point and how it was treated in the miles it has accumulated than how many miles, etc. just because it has *** number of miles really has little bearing on the situation. How clean (relatively speaking) was the engine when you pulled the head? Ring ridge (behind any ridge that may simply be built up carbon? Score marks up n down cylinders? Any cross hatch still visible? ( Might have to look hard to see)
The most likely engine to all of a sudden start eating oil after a head refresh are those that obviously weren't very well taken care of, heads so full of sludge you can't see the drain back holes for starters, would be a sign that refreshing the head or even just the gasket, without going deeper at the same time.
