383 running like s#%t.

Finally got around to doing a compression test and leak down test. Compression is good, checked a few cylinders. Leak down test not so good. It is way off the chart on #7 cylinder. Didn't bother checking other cylinders. Next move is to pull the heads I guess. I didn't do any work to the heads when I rebuilt the motor except lap the valves and clean everything. I was hoping to get by for a while until I could get different heads. I have a set of 452 heads off a 440, they should be good.