I would just keep track of the shims that are on your GMC right now. When you put the '76 control arms on, use the same shims that were on your truck to start with and in the same places. That will get you close enough to get your truck to an alignment shop.
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Originally Posted by old_1966_GMC
what should i do with the shims i mean can i just put them on how ever for now till its time to get a front end alignment
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