Ran out of time, still need to measure and make a judgement.
Picked up my inherited pin gauge set last night, it's nice to have a dedicated tool and all, but will probably continue to use guitar strings
as I have for quite a few years.

Trend seems to be the only company who lists where the taper starts relative to the tip, and they have 2 choices...
The largest dimension they have is 1 & 5/8, I would need more than that, like well over 2 inches, to clear the pushrod tubes.
I'll try some others but it doesn't look like going tapered will help.

Offset won't work as they have left and right, but not up and down (this would need to go up, or towards the center of the block slightly).
I know custom lifters can be had, but no thank$.

Standard pushrod seat height won't work...regular solids and Comp 829 cause worse clearance.

Best I've found is with 3/8 pushrods and +.300 seat height lifters...best mockup is with Comp 861s/oilers
but I am pretty sure the 87019 non-oiler would also do the trick.

Might look into some Manton 11/32" for a hair more clearance, if they aren't cost prohibitive.

I sure don't agree with Edelbrock's statement "all stock stuff works/is compatable".
It's not going to clear the tube with a standard hydraulic or solid flat lifter and 3/8 pushrods.