I drive my car year round... no heater and no wipers RainX for the windshield and a rag to wipe down the windows Although I try to avoid rain when I can. I also replaced my factory wiring when I got my car, it was hacked anyway so I just used a cheap universal harness off ebay. I've got my car down to 2850 without me in it with a smallblock and 904. Next on the ax is the kmember and I'm going to a powerglide
RainX for the windshield and a rag to wipe down the windows 
Although I try to avoid rain when I can. I also replaced my factory wiring when I got my car, it was hacked anyway so I just used a cheap universal harness off ebay. I've got my car down to 2850 without me in it with a smallblock and 904. Next on the ax is the kmember and I'm going to a powerglide 