time for a sleeve.... I gotta send one out to Brian for the same thing. Shame is I believe mines only .030 over. Just hard to find the pistons anymore.
We've got plenty of stock class (Briggs & Burris) pistons in stock.
Wiseco and aftermarket stuff is kind of hit and miss as what compression height and bore sizes we have in stock or can get.
Give us a call, we can fix you up with most things flathead.
Definitely can sleeve aluminum bore blocks with a induction hardened steel sleeve though. We can re-sleeve the cast iron sleeve blocks as well. We do it regularly here in the shop.