There are some nice images of the 3000 at the Atlas Nostalgia forum. The topic was Ronnie Buchnum and has images of some of his other rides, too:
https://forums.autosport.com/index.php?showtopic=79598&st=40
Just spotted this on a Z3 message board:
https://forums.bimmerforums.com/forum/attachment.php?attachmentid=310311&d=1257283242
Supposedly, it's Bucknum driving.
To get back to the original thread - can anyone post a picture of the HSC engine with valve cover?
Steve. go here: https://www.healey6.com/Technical/Dyno.pdf there are a couple of pics in the article, you may have to enlarge them to get a good view.
Thanks! Note the engines show the original cast-iron exhaust manifolds. The two-carb version also uses the log manifold. Pretty outstanding!