Hi guys, just a quickie. I built my 312 last year and shes done about 500 miles. I built it stock and fitted an Isky E4 cam with an adjustable timing set. When installing the cam I dialled it in but I can't remember what figures it came out at. Anyway she runs fine but needs a lot of juice at idle just to run smooth, i had to wind the mixture screws well out to get it to idle at all. I suspected a vacuum leak, i found one and fixed it. I swapped out the Holley carb for a new Edelbrock performer (500cfm) but still have the same issue, needs a lot of mixture to idle. I've just decided to check the cam timing. Checking the cam card it states inlet opens at 22degrees at 17 thou lift, mines reading 26. At 50 thou lift it should be zero, at this lift I'm reading 2to 3 degrees on the crankshaft. Im not sure if this would cause my weak idle situation, or should I be looking at some other issue? I did a smoke test on the inlet and found no leaks. Thanks.