Missed the fan shroud thing...sorry...
Another thing to consider is going to a 180*F thermostat. Above the set point to go into closed loop and provides more head room to the first limp mode set point to reduce power allowed. I like to drill a 1/32" dia hole in the flange to change the hysteresis in opening the stat to wide out
If you are still using DeathCool...make sure the old radiator is rebuilt and if going to new, DO NOT allow O2 into the system. The overflow bottle is NOT pressurized like the newer systems. So it gets O2 in there just by breathing...
I've switched to American Green around 1998-99