got a question for you guys. my camaro was an a/c car but i pulled the a/c box out and put in a heater box. when i have the heater hoses hooked up the heat stays on all the time. its ok in the winter but when it is 100 degrees in the summer it is a little too warm for the heater. i have been bypassing the heater core in the summer but i'm tired of swapping the hoses back and forth.i just got a manual shut off valve that i want to splice into one of the heater hoses but i'm not sure which one to splice into. do i need to use the one from the water pump to the core or the one from the core to the intake? also if i do this will it cause any cooling problems? i don't see how the water will circulate through the motor if it is blocked of between the water pump and the intake. sorry for the long post but i had to make sure i didn't forget details. thanks for any help ya'll can pass along.