Just a first impression- - - -the bleed holes in the throttle plates look WAAAYYY too small for an engine that big, causing the idle speed screws to have to be turned in enough to interrupt the vacuum on the idle ports. On round track race engines with radical cams, it was not unusual for us to have to open up the bleeder holes in the throttle plates to let the blades close far enough to make the idle circuit work.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!