Hot water is fairly straightforward. If you are lucky, you will have an outlet on your them housing on the driver side that you can use as the feed. As for the manifold, just look at the bottom and see if it has the chamber for the stock exhaust heat. if it does, then look to see if there are sheet metal core plugs on the bottom. Many of the intakes do. The core plugs will leak if you plumb water to them so you have to have someone weld little plugs over them so no leaks. Then, just make up an aluminum plate to cover the chamber, drill and tap the plate for two fittings, bolt the plate on just like the stock exhaust manifold, run water from the therm housing to the manifold, and then from the manifold to the heater core in the stock manner. Works great.
