Update: Going to do an about face. A work buddy referred me to a highly recommended, family-owned shop w/50 years in business. They'll charge me 3 hours for a total of $390 to drop the tank and change the fuel pump. They're fine with me providing the parts. In light of that, went ahead and ordered the AC/Delco pump w/sender, a new Lock ring, and Charcoal vapor canister from Rock Auto. Scheduled to have it done on July 9th, will advise how it goes.
Much more down to earth than the $1,593 estimate I had received at Firestone and worth it to me in terms of not having to spend a Saturday pulling the seat, fabbing the access plate and changing the pump.