Try it, yes .035 Thats what I'm running now. It might help it might not, worst thing that happens is you re gap.
try .035 if idle falls then try .040and then .45 ect ect. until you find the sweet spot.
I think the reason your idly is wacky is because your dumping too much fuel on idle. Pull the plugs and check em.
This is a old school way of checking if your running lean or rich.
Buy a new set gap em and change em on a empty road, then do a WOT run 1st to 4th let off and kill engine, Slow down pull over let the engine cool and read the plugs.
If plugs have black on the ceramic or electrodes, then your running rich, if your electrode is white then your running rich.
If the electrode is tan and there is a slight hint of pink in the ceramic in the plug then your running good.
Oh and BTW your idle needs to be at 7500 to 8500