Thanks Swampman. Would you be able to make a rough drawing of what the FP recess looks like? Here's what the Meriden one looks like. I'm curious if the LC is in any way similar.

skeettx, thanks for the link but I've been there many times. The schematic and parts are for a 12ga. The 20ga receiver is much smaller and not set up for the same retaining system as in a 12. I suppose it might be a possibility that the 2 piece pin would work but I've been told that a 1 piece pin was what was used. Problem is that no one I know of has a 20ga Meriden or maybe even seen one.
Kirk