Gas Tank Idea for TBI Swap

[MTCK]

I am getting ready to do a TBI swap on my 77 K10. At the same time I am parting out a 91 suburban. I've been brainstorming the fuel tank dilema (how to find a baffled one) and have come up with a few options.

Order one baffled tank from LMC and set up a transfer pump to move fuel from the unbaffled tank to the baffled tank.

Order two baffled tanks, keep the stock selector valve / wiring and be done with it.

Install the suburban tank behind the rear axle and use a transfer pump in conjunction with the selector valve to pump out of either saddle tank into the suburban tank. Can the stock in-tank pump feed 20-22 psi of fuel?

I am intrigued by the idea of having over 70 gallons of fuel capacity.

Any thoughts?