1988 voyager-thermagasket

i have a 1988 voyager 3.0 with a blown headgasket,more water coming out the tailpipe than going into the radiator.
has anyone ever tried theragasket?
it sounds great,but i've only recently heard of it.
thank you.

If you have more water coming out of the tailpipe like you say, have you ever heard of " Engine Job"?

i have heard of eng. job.
and trying to get out of it.