I have a 350 swap in my 78 with a th350. It currently doesn’t go into gear. Yesterday I found a line under the car that had fallen off from the vacuum modulator, and it seems it was hooked up to the egr port on the Edelbrock 600 carb. Does it need full manifold vacuum? Is that a source of full manifold vacuum? Do I need to put in a nipple on the manifold and run it to there? Is there anything else that can prevent it from going into gear?
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