I tapped my front 3 oil gallery holes for threaded plugs, my question is I got a little overzealous with the far right plug (drivers side), the plug now is countersunk about an 1/8 of an inch. The other two are flush. This going to cause me any problems?

 

No, no problem with that, as long as it's not in so far that it reaches the #1 exhaust lifter. That would take about 1½", so I think you're OK.

Drill a tiny hole in both of the 2 side ones, about .020-.030".... maybe a #65-#70 drill bit.... this will oil the timing chain and make it last much better