Help with 360, too much comp?

F*** winter blend fuel! I ran 10.7 static on my old 340 on 91 with no issues @ all & had a 244 247 @ .050 .545 .545 lift comp cam. also had reeeeal loose converter & 4.10's out back. So it never really got a loaded hard below 3500 rpm. no ping ever. Now my high comp 273 on the other hand with tighter converter & 3.23's don't like winter blend s***!