my machinest told me that .30 over max without a sleeve, .60 max
with a sleeve anything over even with a sleeve not recommended,
and you have to fill the block, i went 4.310 and if i wanted bigger
i would purchase the merlin or dart, you have more work involved
with rod/crank clearance for the 4.5 stroke on the standard 454, the
other after mkt blocks....come ready :wink: 8)
and the car goes.."rawwwwwww rawwwwwwww"