New 408 build finally started

Not cheap, but at least we know he'll able to make it work.
Now, who can throw guesses as to how much pushrod clearance he'll need at that angle? I assume same kind of clearance as a W2/W5 setup, so how tight does everyone run WITH those heads, and what pushrod wall thickness and diameter would that be with?
I have zero experience with highly offset rockers.

I’ve run (and still have some of them) 3/8-5/16 single taper, 3/8-5/16 double taper, 7/16 straight, 3/8-7/16 single taper and and 3/8-7/16 double taper.

I will always run at least a single taper pushrod with offset rockers. Even with just solid lifters.

With the wacky geometry t the lifter and the offset rocker you can’t get the pushrod stiff enough.