Same Heater core?

Whatever you buy, get ready for a possible trip to your local AC/radiator shop. I bought one from Rock Auto that was not close to mine as far as where the tubes exited the box. Returned it and got one from Classic Industries, more expensive, and guaranteed to fit. Had to take it to the shop and have the inlet/outlet tubes bent into shape to fit through the firewall. Naturally, the bending caused the solder to crack so I had to have that done. Short story, my 65.00 heater core ended up costing me an extra 30.00 at the shop, plus 7.00 to return the first one to Rock Auto.