I just checked the compression on my street 170, last week. Mine was 165-175, just about the same as yours. My engine is a measured 9.5 to 1 CR. It has the mildest Mopar Performance cam. I don't remember the center line I used (need to find my notes). And we have similar problems. Just a FYI
PS: It seems to like about 30 degrees total, and in the neighborhood of 15 to 20 degrees initial. but as I stated in a previous post, I haven't done any dist recurve yet. and cheated on getting the initial, and total I wanted, by connecting the Vac adv to manifold vacuum.
