On the 87016, from the bottom of the wheel to the top of the body is 1.810”.

From the bottom of the wheel to the center of the link bar attaching screw is about 3.050”.
They are designed to be able to be used with blocks that have tall lifter bores.
I used them in a World aluminum block with a .484 lobe lift cam.

Here is a pic of an Isky Red Zone that has the flats on the sides of the body like yours.
They have the EDM holes done the same as well........ but they have added an oil band to get the oil from the gallery to the EDM holes.

As you’ve discovered....... without “connecting the dots”...... the EDM holes aren’t much help.

I have a few customers running the Sportsman lifters with no problems, but they are all running stock blocks.
However, I don’t think there would be any issue running them in a block set up like yours.
For the BB Mopar application, they do not pushrod oil.