How much are you paying for it? It might be more cost effective to buy an aluminum or copper/ brass unit that will drop right in than to mod a B body radiator to fit.
He's asking $40 for it, I was trying to stick with brass/copper Mopar. Next for me would be any 26 inch brass/copper that has inlet/outlet on passenger side, to this point I haven't been able to source one. Even tried Summit for aluminium, they didn't have it. It would help me greatly to know the exact maximum height dimension. My car is not together enough yet, no core support, fenders or hood yet to take the measurement myself.