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I rebuilt a 396 325 hp engine for my 69 Chevelle
SS last summer. I used heads off a 1973 Monte Carlo 454. Over the
winter, while starting the car I found that it was idling rough and backfiring
through the carb and exhaust. I know that my plug wire need replaced and I
have a new set of Taylor but I need a friend of mine to cut them first.
When I removed the plugs I found that they were carbined up. I was only
able to put about 300 miles on the engine after the rebuild last summer before
cold weather.
My question should I use a hotter spark plug.
Would that help. If so, the engine calls for Autolite number 145, I bought
a number 147 but what would be the hottest I plug I could use. (Hope this is a
valid question)
Craig
69SS
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