has anyone have any experience with these??? And how long would it take and how hard is it to do?

Not too much harder then doing the lower intake gasket. The front head is quite simple but the rear head gets a little annoying to work on, The head gasket set is around $200 though, and I would really recommend taking the heads to a machine shop if your unsure of how to check springs, valves, valve seats and the surface for warping. Head gaskets can become a pretty pricey job, but Im sure you would be able to do the labor yourself.

$200!?!?! He just needs the gasket.... They shouldn't be close to that...

anyone know the procedure

Wasn't this just discussed in another post that you just posted???

yes i did