[cutthroatkid]

I've been trying to get help on this to no avail.This is the deal I have an 80 mustang with a 200 i6 the carb is a 1 barrel motocraft with all of the emmisons junk,well when I'm driving&I hit about 45 itll bog down&loose all power,then if I turn whag I belive is the Air fuel mixture screw(I have no experience with this)well it'll fix the problem so that I can drive as fast as I want&it won't bog down or loose power but it will overheat&I don't know if this has anything to do with it but my heat won't get warm inless I keep my foot on the gas.Any ideas please?Id appreciate it thanx!

[wayneooo]

change the manifold or get an adapter plate to switch it from a one to 2 bbl carb that carb might be screwed up

[oldBodyman]

"but it will overheat&I don't know if this has anything to do with it but my heat won't get warm inless I keep my foot on the gas.Any ideas please?"

the car overheats
the antifreeze boils over into the overflow bottle
air bubble in the engine and NO fluid in the heater

change your radiator cap AND have a garage vacuum fill the radiator to remove the air bubble. Fix it soon, you could blow the head gasket or crack the head.