Hmmmmm, 198 issues

I like the Boost suggestion. Really, though, the 198 is a sweet engine, eager to rev and very smooth. You can take advantage of the revs with the 3 sp manual. I have a '74 Duster with 198/auto combo at 22K original miles and like it alot. I can't justify a V8 swap. The only thing I am considering is a 2 barrel/ 2 barrel intake and slightly larger exhaust to add a few ponies.
I would check on the valve seals. Has it has been sitting? maybe drive it to see if the rings are stuck and to loosen them up. What ever you do, Have Fun!