I don't believe the fuel pressure is excessive- I'm running a carter mechanical pump (one of the ones that bolt together), but again not sure of psi. I checked the rod plungers/springs, they're pulled down at an idle. I gapped a new set of plugs .050 & installed them- it actually seems to be a little better, odor/smoke wise. And a bit snappier when I blip the throttle. Only concern is they are rn 14 yc plugs, and I don't want to run too hot. I'm going to go get a new set of 12s right now & try them,too.