I have a real nice 76 C-20 I picked up about 6 months ago with one problem. It has a junkyard motor in it (I have a new 350) and I have no ideal what it came out of it looks like the emmisions have been mixed and matched. I need to know if a 76 C-20 with a 350 is supposed to have an EGR valve? It makes no diffrence to me since I have several intakes I just want to put on the right one first. Oh and this is a California truck. I have also heard that 3/4 trucks back then didn't have as much smog on them such as an EGR valve.