Good thread. Age certainly has nothing to do with this interest, either. I'm 62, and still drive an innocent looking 1977 Datsun Pickup with a loaded 355 / 350 combo. Gives me 24mpg and the pleasure of occasionally dusting off a "know-it-all", punk kid. I'm mostly a lurker, but do read all the posts. For the record, I own three R-390A's, one R-390 and five SP-600's. 73's de Paul K2LMQ/7