Interestingly enough, if it was bored 0.125" over the production 4.5" bore, to a 4.625" bore, while still at the 6.0" stroke, that would make the engine displacement 403.2 cubic inches. I've never looked into over-boring the Continental 382 engine, but 0.125" over doesn't seem like too much of a stretch...
Any of you pullers out there done this with the Continental 382 engine?
- JB