gt6 Mk 3 - running it

["paul stapleton" <paul-s@FreeNet.co.uk>]

hello,
        IM after some advice, I have just bought a gt6 with a rebuilt engine,
gearbox and overdrive. I have been running it in at 2250rpm this gives me
about 50mph in o/d 4th
the engine has done about 80 miles since the rebuild. is this to high or to
low?
        The heater blows cold air out only so I think it has an airlock in the
heater radiator what is the best way of bleeding this.