The McGee motor was a dual overhead cam, 4 valve per cylinder design. It used the traditional Hemi short block with the high tech stuff on top. Bernstein/Armstrong tested it at length in the mid-to-late 80's (pre-Buick days).
The Sainty is a different project all together. It is a pushrod three valve not very much removed from the current SOHC Ford 4.6L engines in the Mustang, F-series, and E-series.
Lest we forget that Ford tried to re-introduce the Boss 429 to nitro racing in the mid-80's. Billy Meyer did a bunch of on-track testing with a version of the motor and instantly exposed the weaknesses of the availability of good block designs of the day. That little experiment brought us the now prohibited three magneto set-up that Meyer and a few others ran on their Hemis for about a season.
Trivia...who was the owner and who was the driver of the last true Ford-powered nitro car to qualify at an NHRA national event?