4.1 overbore Q

["More Boost"]

is that one lifter bore offset (screwed up) on a 4.1L like a 3.8L? (i'm referring to the lifter that rotates reverse of all the rest) anyone?

 

[CTX-SLPR]

I believe that problem is in all Buick V6's of the classic Even-Fire generation. I never check into it fully since I'm running a roller in my 4.1.