Cal-33 pulls hard to port under power

A friend & I bought a Cal 33-2 (Hunt design) last Fall. We noticed while motoring home last October that it pulled to port pretty significantly. Just got back in the water this month and the pull to port seems even worse (though not sure about worse). PO says that it always pulled, and has to do with offset shaft and screw. Prop and shaft slightly off center. But this seems excessive. Now, there was delamination in the rudder. We used the drill and fill with epoxy method (I know…Cal-33 pulls hard to port under power