I've got a 74 challenger with a 360 in it. When I bought the car I was given a set of 340 x heads with bigger valves and some port work done. I put them on the car last winter and ever since, if sitting at a light, my temp will keep increasing. up to 240 degrees and will start to boil the fuel in my carb. I end up shutting it off come this point.I never had any problems like this before I put the heads on. if I drive it the temp is around 195-210. I matched the head gaskets up when I first did the swap.. im a licensed mechanic and definatly know what I am doing but I am stumped and any ideas would be greatly appreciated. thanks in advance
