My heater was disconnected when I got my 70 Maverick and I have new hose for it but I dont know where they hook up under the hood, I know where they hook up inside the car
Might be a reason they were disconnected...like a leaking heater core. http://1bad6t.com/Maverick/diagrams/untitled130.gif
You can see (kinda) where the hoses are routed. Without A/C the coolant always flows through the heater core. There is no control valve.
I can hook up the hose on the left side but the one on the right side where the coolant hose is theres no pipe to put the hose on theres just a bolt in the hole, is that the right spot? what can i use to hook it up? should i drain the radiator first?
Like rthomas771 said, you probably have a bad heater core. I'd check that out before pumping hot coolant through it and getting it all over you interior. People don't typically bypass the heater without a reason.
You can take it out and look at it, or you can hook it up and pressure test the system, but you'll know if your passenger side carpet is smells like antifreeze. Look for evidence of leaks in your heater box behind the dash. If your car is a non-AC car, you can replace the heater core without taking the heater box out, it's just a few clips holding the two sides of the box together. It's kind of awkward but not particularly hard. Bigger job if you have an AC heater box though.
Doesn't really matter. If you have a control valve, as AC cars do, then you'll want to make sure the coolant flows to the valve before the core, so you're not pressurizing the heater core all summer. But if you don't have a valve then it won't make a difference which way it flows.
Shop manual shows return hose is connected to the waterpump and the other end goes to the top port of the heater core...the supply hose from the block goes to the bottom port on the heater core.