99 venture head gasket problem?

I have a 99 venture and have noticed a coolant leak. I have to add about a quart every month. I think I have pin pointed the leak to a faulty gasket either in the front head or possible on the intake manifold. I was wondering if anyone else has had a similar problem and if so is the job doable or how much would it cost to fix. Thanks.

If you performed a search, you would see that intake leaks are a hot topic with GM owners...and GM Techs too...
I have had a few of these with the rear head gasket leaking...not a bad job, just really labor intensive

Yes, I'm beginning to think that GM should include a set of intake manifold gaskets in the glove box as standard equipment on these vans when they are sold at the dealerships. LOL