[72SB]

Another option I considered was using a 75 Nova tank that goes inside the PS fender next to battery, but my charcoal canister is there.

I did it on my 67 Camaro so if your PS fender is not occupied with something else this may fit. It's a OER and I got it at Summit for about $40 IIRC

But the Dorman I used is much cheaper and does the same function. Just used 2 sheet metal screws to attach it and a spacer on the one screw shown in original post