I'd do what gunscrew guy says!
Break for parts?
'Diligentia Vis Celeritas'
Its not what difficulties life throws at us, but how we face them that defines us....
Yes it will work but will take a lot more work than a ramp. I've done only one HS and it was a 12g pump. At some point the late models were put on with some kind of epoxie. I'm not sure if rib was steel. That's first thing to check, if rib is steel it can be soldered. I just checked out a HS rib I removed from a gun that I cut down for slugs. It has front bead hole and cheater bead. It's been a good while since I did that HS but I think I used front bead hole to line up rib. I don't remember if bead went through rib into barrel. If it didn't I D&Ted barrel for bead. Same method used except besides the prep you are going to have to have clamps or jig to hold rib in place. Barrel should be held separately. Clamp action so rib will be top dead center, then clamp rib to barrel. I have seen it done by using wire as twist tie of rib to barrel. The rib doesn't have much side to side flex, just rib to barrel contact has to be clamped.
Never trust a man who rents pigs : Gus, Lonesome Dove