Fel Pro pricing
I paid (US Dollars) around $115 for the complete set required to do headgaskets which includes the intake manifold gasket and all other required gaskets. If your block and head surface is good, you do a clean job (cleanliness is the most important part of the job) are really careful not to bend gaskets, do some extra insurance things such as some good adhesives, extra stage in torquing, using studs, some porting on the heads and exhaust manifolds at least, and pay attention to exhaust, fuel (remember detonation is a big factor in headgasket failure, exhaust and surface imperfections are big factors but running lean will blow hg's), and temperature, you shouldn't have any future headgasket problems. That is not a guarantee, luck maintenence, driving style and more are other big factors. Changing coolant and fuel filters will greatly increase headgasket life.
One tip, I've had the best luck getting valve covers to seal by using the ford gaskets rtv'd both sides then use a light thread locker on the bolts. If you have any questions feel free to ask.
Adam Mullen
The SC Kid