Try some of the tractor salvage yards listed here:
https://www.google.com/search?q=Tractor+salvage+Madison+ALWell, scratch that idea! Search "tractor salvage yards in North Alabama" to get to that page.
A lot of combines, and other big farm implements used 292 Chevy engines as a powerplant. There are actually brand new 292's manufactured in Mexico, or maybe Brazil available, but the purchaser must claim he's repairing "off-road" equipment to keep the clean air eco-terrorists off his case.
Jerry