Okay, I'm not clear if it's legal to add a Kick-Eez type pad on a Marlin 1894 or a Rossi M92. Anybody? Thanks.

Yes it is legal.

Here's the rule: 3.1.3

"2. Barrels must be original or may be relined. Original barrels rebored to a larger caliber are allowed. Any
safe trigger is allowed. Stocks must be of original configuration. Recoil pads or replacement buttplates are
allowed."

I've got 1-1/8" pads on mine for added length. No problem at the Nationals.