Prolly the only boot the previous owner could find at the time. Grumman surely wouldn't have let the vehicle out of the factory with such a jerry-rigged shifter boot that doesn't cover the hole in the floor.
The round boot may have been the one used for a different application, like a pickup truck or something.
Ah, I see.
My chassis, motor and drivetrain are a Chevy P30, so that may be why.
This boot was the one listed for my vehicle on the Mill Supply site. I'll keep the link you send me in mind. Thanks very much.
