Last time I saw the car in person was 10 years ago & I never got to look under the hood. It was prepped at that time at Jim Glass Corvette in upstate NY. A few months ago Mark told me he had a new mechanic shop around Buffalo? NY. Honestly don't know if 350, 383, 427, 454, 502.
It sounded real sweet in the videos I shot at Limerock. It amazing how far back he was in the 3 heats at Limerock & ended up winning that Group Trophy. Since Watkins Glen is a bigger & even more hilly curvy track - Mark must have his mojo back after an absence from the vintage race scene.