I'm not saying this is gospel. I'm saying I increased timing 1deg across the board and computer is up 6mpg compared to last trip to Denver and back. What's max safe timing? I've done arp400 studs, 103 springs, compounds, pushrods, 7x.012injectors, sovp44 on ho 02 nv5600 2500 with dual disc valair 650 . Thinking motor mounts need attention and maybe traction bars. Current tune is 100 fuel till 5psi then starts climbing, on road now, will send timing curve asap. All suggestions welcome. 120 mile trip.