remember that all that linkage is hanging out over the valve cover and you have to have clearance, now combine that with the hood clearance piece of the puzzle
I've been holding valve covers up to look at that. Stuff will be close I know. No heads in place to confirm clearance right now. The 1/2" carb spacers will help. Hood clearance is definitely on the radar screen as the carb body itself is 1/2" higher than a normal 4150 Holley.