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63corvette · 01-26-2009, 10:57 AM

I know for a fact there is a 10 degree difference between the 6AL and the 7AL boxes.
When having a problem with the ignition on my car which had a 7AL I borrowed a 6AL from a friend and when checking the timing it was exactly 10 degrees different from the start.
It has been a couple of years ago so I do not remember which way the 10 degrees was fast or slow but I do remember it was exactly the 10 degree difference.
Don't know if that helps but good luck with the fix.
My 2 Cents

01-26-2009, 10:57 AM	#3
63corvette Senior Member Join Date: Mar 2007 Location: Canyon, Tx Posts: 551 Likes: 127 Liked 353 Times in 102 Posts	Re: MSD and timing question I know for a fact there is a 10 degree difference between the 6AL and the 7AL boxes. When having a problem with the ignition on my car which had a 7AL I borrowed a 6AL from a friend and when checking the timing it was exactly 10 degrees different from the start. It has been a couple of years ago so I do not remember which way the 10 degrees was fast or slow but I do remember it was exactly the 10 degree difference. Don't know if that helps but good luck with the fix. My 2 Cents