Okay, here's what I got... the second car was built by Barney Navarro in 1968 and was powered by a Straight-6 AMC engine displacing 199 cubic inches. It was a flathead, and was twin-turbocharged. Problems with the carburettors werre enough to keep the car from qualifying, even though it was rumopred to have put out from 550-700 hp.
Possible connections between engines:
1. both flatheads
2. both turbocharged
3. both used more than 1 turbo
Connections woiuld be Duesenberg/AMC, Navarro family[?] and one of the afore mentioned engine connections. Am I getting close?
Dan