Hey folks, The wipers motor on my 72 SIII started smoking and the mechanic simply disconnected it. I've been looking online and see that new replacements are $379 here. Do you know if 1) I can use a single speed wiper motor? Or 2) Can I use motors from other models, an SIIa for example? What do you recommend as I can't afford a new one but want to be safe. Thanks, S