Marco, my FJ40 had a Ford external fuel pump on it connected to my Holley Pro Injection way back when. The pump never overheated or had to be replaced while I ran that system. I'm sorry I don't have more specs on it but might be a solution rather than cutting the tank.
Speski OffRoad LTD, Cargo Solutions for Toyota 4x4's http://www.SpeskiOffRoad.com
"80 series, with a fridge"
1976 FJ40, Project with little progress.
2004 Starcraft 10RT