[Rawkkrawler]

Thanks everyone! I feel better about the numbers.

I have, however, encountered a new issue....severe backfire during deceleration. Just when I thought the complete MSD ignition swap smoothed everything out. I have read several posts and everything points to a header leak. I did initially want to blame the ignition but it most likely is fine. I pulled plugs this morning (their new with 100 miles) and found most a light brown color. Number 3, 5, and 6 look brand new out of the box. Is this an issue? My initial timing is at 20 degrees.

To answer some questions asked earlier in the post, I don't plan to race, just want a smooth big block that I can cruise around in.