After some digging by Martin Krejci and myself, we've identified that the "Invader" owned by Lou Infante and driven by Jerry Molnar and Frank Jellinek in 1982 and 1983 was a Chevron B29. The engine is described differently aeach race but it might have had a BMW at first, followed by some sort of Hart/Cosworth/Ford.
I have no idea which B29 of course.
Allen
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