I'd loan you my leak down tester if I was local. You could probably get one from Summit for less than paying for a test. Same with the pressure tester on the cooling system. But I agree with Gary. If your loosing coolant you need to determine where its going.
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