Are you planning on registerng it for the road? I dont see why you couldnt bring one in. You might have issues if it was a complete (turn key) but without a drivetrain, its just parts. If you do plan on registering it, make sure the 'donor vehicle' is old enough to register without issues.
yes for the road....
looking to use a LS6 corvette motor.....primarily I want the tube chasis and body panels of the Bowlers
I'd think it would easily fall into the kit car category since it's not a production vehicle. Read up on the rules - the question of "home built" D110's has been hashed around on this forum repeatedly but since the Bowler isn't a production vehicle (in the eyes of the law) it may be eligible. The use of a late model Chevy motor might cause some complications as far as emissions requirements (check your local state laws concerning registering home builts). I wouldn't think building a Bowler would be any different than buidling one of the '32 Ford hot rod kits.