Trouble tuning 340.

Here is OP’s response:


I'm pretty confident that I'm close with the timing (rotor at #1, no backfire). Car starts and runs but idles rough when put into gear. Car ran good before exhaust was installed. I was told that I would need to re-adjust things after exhaust was put on. After reviewing threads about compression, I thought mine was too low. My vacuum also is low. Will post pics tomorrow when it is light out.