i'm startin to think more bout bad valves. bout once or twice a week, when it's been below 40f, it'll smoke week i first start it...but it leans out and goes away in a min or two...faster if i give her a good rev. valves wouldn't attribute to the actual oil round my block though would they? i know it's not the rear main...seems like the most deposit is near my dizzy. maybe the cover isn't sealing correctly? i've gone thru my books...and general knowledge of the obvious. not the pcv. not the plug-with new looking copper washer. no vacuum leaks. she does click a lil...mostly uphill. i've retarded my timing...bout 8 btdc, was 12, book recomends 7. my biggest fear is that i'm gonna have to rebuild my head...or worse find a newer one. if so, where do i get a head for a a15? can i even get a rebuild kit?