Ok 360s are externaly balanced and 340, 318s are internaly balanced correct ? I finaly took my barracuda out for a test drive that has a 360 with a super charger. I didnt go over 3000 rpms. I went for about a mile and then came back and check the timing since it was up to temp. Took it back out and did another mile. On the wy back i decided to get on it alittle more from a rolling start. I heard this awful grinding skweeling noise coming from the engine bellhousing area. So i took it...
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