Back in the day, Matchbox did a set of monster trucks which included USA-1 and Bigfoot. Both the trucks are on the same casting, even though they were Chevy and Ford. The casting in ambiguous at best - but more Fordlike. I'm still hoping for a true early Chevy version. I found a custom version on the Hot Wheels casting like the Titan above which is pretty good, but not $35 good.
Here is an example of the one I have now:
http://www.ebay.com/itm/1985-Matchbo...3D201699174833