1996 Ford F-150 Expansion plugs

Expansion plugs are deteriorating and leaking, have bought kit. Don't have room to remove and replace, or perhaps am missing right tools to do it myself. Don't want to remove exhaust manifold and injection assembly, is there a way to do this without taking all this off?, And Sorry am unemployed and dont own credit card, otherwise would gladly donate for your time, and much appreciated help. Thank you