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New HEI
I have a 402, 1971, in a 1 ton truck. A couple months ago I bought a cheap hei distributor on Ebay. It did not run very well. I could either idle good or rev up good. Set timing over and over. Engine was not happy with a 40 dollar distributor. So I got a new Petronix distributor. Ready to put it in. It came with several springs and also has adjustable vacuum advance. This should work much better. My question is, what is best spring and vacuum adjustment? I took a picture of instructions so the people here came inform me of best option.
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