Removing push rod from MC

Ouch... that puppy's TIGHT. Soak the rod end in PB Blaster or your penetrant of choice- I usually clamp the MC in a vise and put a length of rod through the end of the pushrod, work it around and give it a few good yanks. It usually pops out, some easier than others. Yours is pretty crusty, obviously will take more effort.
New parts:
manciniracing.com
among other sources...