Hey Brian, Another obscure one. I have many other liveries of this hull,nothing with twin V-8s, and nada as Walter Special. Here is one of the hull running as U-77 Country Boy from Three Point Unlimited Hydroplane - Name Changes. And another DIW. I see nothing of it running with cowl on.
Who's Who shows:
1971 as U-77 Country Boy DNQ in Owensboro, DNF in DEtroit, DNS in Seattle, DNF inEugene,OR, and DNF in Dallas.
1972 also called Country Boy: DNF in Miami, DNF in Detroit, DNF in Madison.
The hull didn't accumulate any points either year, and is show as "Did Not Finish" in National High Points standings both years. Appears to be a "Pier Devil".
CHEERS !!! Bob