Tuning my 360 with a wideband.

right now I've got the brown cam and a 31 shooter, it seems to really want the large initial hump in the cam. I just drove it again and its quite a bit warmer out then this morning. It seemed to bump the a/f ration up quite a bit, so around 2-2.5k its now in the 15.5+ range and in the 3k+ its reading around 14.5. Is the 15.5 safe? I think I understand about what you're saying with the PVCR, got to keep the ratio correct when the vacuum drops.

I have read of putting in an extremely large primary and drive it just to see exactly where they start to come in on the a/f gauge.

Heres another question, do you think, since this is a 100% street car, that it would be worth my while going from an m1 single plane to a dual plane?