I pulled mine apparently off of a later model ford truck. In order to start on your's you are basically gonna need a new balancer with the 4 hole mount, then go hunting in the junk yard. The alt can be done easy with a spacer for the furthest bolt on the head and a tension rod using two heim joints. But the alt bracket with the tensioner is usually a pretty easy find- very common for many years.
Here's what I needed:
alt bracket, p/s and a/c bracket, pulleys and bolts (60$ from junk yard)
reverse rotation water pump (various)
new belt (various)
new a/c compressor (my brackets wouldn't allow running without one... came oiled so it's been a very expensive idler pulley for a while)
new power steering pump, saginaw type (various)
hose fitting for new pump plus custom line to p/s control valve (60$- I got jewed on that one)
radiator with opposite sided inlet/outlet (1970 should work)
assorted radiator hoses
I also ended up doing the 3G alt swap at the same time.....