Dear Loren and mid-60s Buick
"longroof" fans, . . .
It looks like it will handle the task quite well. I like it. Many thanks for the pictures.
. . . .
Thanks for sharing your opinion! That's good to know!
Is that the stock fuel tank ? . . .
Well, it is supposed to occupy the same space, but no it is a reproduction tank from Spectra Premium for the 1964-67 El Camino:
https://ecat.spectrapremium.com/products/GM37EFIThis is the reproduction tank with the EFI fuel pump. It can be made to work with the Sportswagon. The filler neck needs to be adjusted somehow. Someone managed to pull it off on V-8 Buick but I've long forgotten what the trick was. I've had no problems with this tank. They seem to have come up with a reasonable baffle system so the fuel remains to cool off the pump.
I would expect you might be in the market for a gas tank like this given the drivetrain you have in mind!
Cheers, Edouard
P.S. The only issue I've had with this tank was as a result of the car sitting without an engine for over a year. Shortly after being idled, I siphoned out as much gas as I could. When the engine came back, the fuel pump failed almost immediately and the fuel sending unit hasn't worked properly ever since. However, I assume both problems where caused by leaving the tank with whatever little gas was left for such a long period of time.