I have an early 1980 FJ40. I am doing a desmog while I am installing a header because all the sh%* is in my way, breaking, or just a general pain in the ass. Anyway........I am trying to figure out what to do with my smog pump. SOR offers the pulley replacement which is noted to fit 8/80 and later cruisers. Does anyone know the difference on the smog pumps from the early '80 to the later '80. I found a good deal on a used SOR pulley, and would like to install it if the pulley can be retrofitted without too much effort. Any info? The alternative I was thinking of would be to simply leave the smog pump hooked up and pipe the output to high dry area in the engine bay.