Be careful about cleaning the throttle body; the old carb cleaner trick would usually work for a while, but can lead to wear faster down the road; the first sign is that the throttle will 'stick' when accelerating from a stop. Since these were one-piece throttle bodies ( they were integrated with the upper plenumn), they got pricey, and that was back when they were availible.
However, I don't see any alternative!

mark