I just installed a wizar aluminum radiator - the well for the radiator cap is 3/4" deep Vs the stock radiator at 1" - what effect will result by running the 1" cap on the 3/4" well - the static spring load is 25% greater - me concern is the heater core - I have ran a 7# cap on my rebuilt stock radiator with out any problems - note, I did rebuild the heater core - midnight