I have used a gel type chemical stripper, a garden hose and a light duty (fine wire) brush on a drill motor.. It works very well.. Pull all the accessories off, put in a set of old spark plugs and locate a rubber cork for the removed distributor.. be sure to run water through the coolant system as well in case some of the stripper gets into the waterneck if you have the radiator and hoses off..
Paint on the stripper nice and thich and wait.. give it 20-30 minutes and then hose off with a strong stream of water or pressure washer.. The wire brush needs to be used only after it is rinsed for stuck on areas, as if you brush before rinsing. you will spray very fine and powerful paint remover *everywhere*
I went through 2 cycles of this and then adter it was finally brushed and rinsed off, dried it with a air hose, rubbed it down with paint thinner and painted it up.. Still looks new after 3 + years..