Disclaimer: I have no experience with sleeves.

Block: R3 tall deck, 48* Non-siamese.

Block is currently on 4.00 bore. This is for a big-inch W9 deal. 75% street 25% strip

Molnar 4.125/Callies 6.200/ Predator solid roller 279/289 @.050
T&D 1.5 yeild .710 both sides

Heads are Brett Miller W9 2.18/1.60

Desired bore is 4.125...but I can live with 4.100
I was sold this block and not disclosed it had sleeves in #5 and #6.

I have never dealt with sleeves before. My sonic testing tells me the sleeves are too thin for anything I want to do.

My question is..Can #5&6 sleeves be removed and can the block take a heavy cut to allow replacement sleeves that can meet my goal of 4.00-4.125 bore?

What questions should I be asking?