I figured that this was gonna be a head scratcher. We noticed the circled 48 on the first look under the hood but didn't think there'd be any significance other than maybe a symbol for the plant where the engine was forged.

The Offenhauser valve cover and the Fenton exhaust might suggest that the original owner of the truck stepped it up in terms of HP with this motor.

Any ideas on where we can go next to source this 235's (?216?) origins? Maybe repost under a "Mystery Motor" thread or something like that?

Thanks, Rob