I think a few minor modifications would be worth it to get the Optima in there. Wonderful devices.

That said, there are a number of guys on the GMC site with 6-volt Optimas, and I don't think any of them have had any fitment problems, including the guy with a '37.


Get a REAL truck, get a GMC! www.oldgmctrucks.com
1954 GMC De Luxe COE