Roger, there's been some speculation around here, and a couple of posts suggest that the Poulan Tim Allen Bad Boy might actually be a 380. Hopefully some knowledgeable members can provide better answers than mine :dunno:.
I just compared it to a old 3450 piston I had laying around and it is the same exact size as the 3450. So the Tim Allen must be something else or all 3750's have a larger bore.