I have this problem that's been the plague of my '65 Stang for the last
several months. Ever since a damn-near complete overhaul of the top-end
(after a bout with piston slap) I've had this crazy repetitive clacking
sound coming from the passenger-side lifters.. and particularly in the last
few months there's been a problem with backfiring whenever I accelerate.
Apart from a replacement set of lifters, could there be any alternatives?