Call H&H first. I think they may have been who made the lifters.??
I wouldn't relieve the top of the liter bore, they are pretty short as they are and could cause wear problems. Best way is to adjust the lifter while its out of the bore. Its really not that time consuming or difficult...
Curious, what lash specs are you going with?
I asked H&H when I was shopping for lifters, they said they didn't have them. Red's were the only ones I found.
My reground cam card says .010" lash for intake and .012" exhaust.
