https://www.youtube.com/clip/UgkxBls...WBv85omkFkbCTQ
click link above, then click watch full video at bottom of picture of video, it will play the entire Pontiac engine section
perhaps this has been posted already, but it's not often you see a Pontiac aftermarket block/head combo flowing 510cfm intake at a major ICE performance industries workshop presentation. by the looks of the rocker system, angled pushrods, and 570" I'm assuming this was an IA block, Tiger head combo, made around 1250HP on the dyno. but it's hard to tell by the light vague slide pictures. they added a plate across the valve cover rails on the intake side, to raise the port higher, and used a 351 Cleveland valve cover.
or is it Edelbrock Pro Port CNC heads on a Kaufman MR1 block ? can't tell