I agree, that cam is way to big for the stock 326, plus with that kind of spring pressure you'll pull the studs right out of the heads after a short time of running. That cam would be more suited for say A 400 or 455 with a little bit of compression , something close to 10-to 1 comp. Those heads won't breath enought for you to get anything out of that cam. Go with something a little smaller or you won't like the way it runs or TRYS to idle.
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