cpt
+1y
I personally prefer SMC. Ive used the 3/8 SMC many times and had minimal problems. I have 1/2 of the valves GC and 1/2 SMC on my c10, the GC were sticking right out of the box, they are louder, but slightly faster as well.
My SMC do stick sumthing fierce when the weather is below 20 degrees, so if cold is a issue for you, just a heads up. I have heard that the GC's have the same problem tho, but I have not tried them on my ford in the cold yet. I dont run a water separator.
Sui doors had the 3/8 SMC for 25 bux each at Indy and other shows im guessing, at that price I personally wouldnt go with anything else.
my $.02
Dave