How hard is it to replace front rear spring mounts// mine is rotton..and has anyone used a donor heater/ac unit from another car or truck? for 69 camaro.. s10?? looks like it may work? any help?

I used a 1970 Nova complete ac system in a 1969 Camaro and it fit like a glove. Found it all in a junk yard for $100 for the entire system. I replaced the o-rings, dryer, throttle valve, and it worked great! I probably got lucky though, since the car was only in the yard for a month.

great,, you got lucky..70's nova is hard to find w/air how about something newer? any one tried s10? the blower motor mounts on firewall..?