compression test results.

7.5:1 is what I figured aswell.

Yes I'm having an oiling issue. http://www.forabodiesonly.com/mopar/showthread.php?t=6107

I decided to run the compression test to be safe. As far as I know all 71, 340s had forged cranks still. I also think I've read early 72s could have either forged or cast cranks.