Just replugged my 85'. The factory gap is around .035" I was running .050" w/ my HEI distributor and it worked well. However, I've been going round and round with AZ emmisions. So, I stuck w/ about .040" and called it good. BTW, I failed the dyno test 4 times the new plugs and a new cat did the trick on the 5th try .
Seafoam is the s***! Really, really improved my 295K mi motor. I picked some up at Napa. Follow the directions pouring straight into the carb. Then put a little in the tank. FYI- ran a can through my 100K mi 3.4 Tacoma and smoothed it out as well.
if i seem to burn oil mor than I'd like, will changing the gap make a difference? i used to open it some on my endoro bike ( waaaayyy back whe i was young) when the plugs would start to foul.
I changed out the plugs and wires as they were looking bad, and put a high power coil and quality wires in, gapped the plugs to .040 . Seemed to work really well, better milage and WAY better cold starting. Also increased power alittle.