My old school 340 upgrades and results.

Do you know where timing is set at? Initial, and total? I set up a MP dist on my last 340 with close to 20 initial, I set the total by ear to break in a new cam and when I went for a test drive it sounded just like yours. Got It set at 34 total with a light and no more miss, rotor was jumping spark between terminals. Just something to check. Car sounds good otherwise.