340 valvetrain help

Andrew,
First off, welcome aboard the Mopar ride! As for your new ride, NICE Duster! As for the 340, valve train, tune and carburetor set up, I bet what I'm about to say all will agree upon, more pictures! By looks we can help you with the type of Carburetor on the intake, and that can lead us to tell you what you need to do for timing (I agree 25 initial sounds a bit high, and I agree with the 18 that someone said.)

But pictures of things in question can be "seen" or spotted so, get the best up close pictures that you can for anyone here to see that way we might be able to tell you by "sight" and then you can take that given info and look it up on your search engine to get some real numbers and or settings for the tune your looking for and what to go as a "base" tune.....

Needless to say theres a buncha smart ones that can help you out I'm sure specially the "seasoned" ones that go hunting in a yard or spot things in pictures from yard hunting....

NICE ride man!