Curious as to how much boost/timing others are running. I have a SBE 5.0 ‘89lx. Gt40p heads, Novi1000 pulleyed to 7lbs. No intercooler. Timing is locked at 22 degrees with the spout left out. I have a Mr.Freeze kit spraying 50/50 water/methanol and I also put a bottle of VP Octanium in the tank with 93 octane. With an air/fuel ratio in the 10.x:1 range, I’d think it would still be safe in the 10psi zone. How much boost/timing are you running?