For the Heater not working, where the hose off the back of the head goes through the firewall & into the heater, there's supposedly a valve that turns on & off the hot water to the heater core. This might have corroded into the closed position, or the cable from the heater control lever might have come off the linkage. Give these a try. There also appears to be a tape in the line that i assume comes back from the heater, with goes into the smaller branch of the inlet pipe on the drivers side ( the pink hose that runs back) this might be the problem,as i've never seen anything like this tape on any b210's or 210's here in Australia. Check if this might be the case.
What year did the USA start mandating those hideous Bumpers. They started making the b210's in 1973, maybe this is before the uglies struck & you could get something locally. As for how much to ship Bumpers from Australia to the US, i bet there'd be some people who'ed do a straight swap for one of those 5 speeds