Heater core

Looks like a Spectra aluminum one I bought for $37...and didn't fit. I ordered a copper/brass etc from Classic for $100 shipped. I'll let you know if it fits. I found NOS for $195. After fighting with the Spectra and then the Pro from Rock Auto, but neither fits although they are good at breaking fiberglass, I'm ready to pay more so I can finish my interior. A heater core that fits is the only hang up for my Barracuda