Plugs on passenger side much lighter

[ian75c10]

hey guys the other day I noticed what almost sounds like a lifter tick. Very slight. It increases and decreases tick revolutions with rpm speed. I first went to check my plugs thinking I might have one that was slightly fouled. No plugs were fouled but it was strange that all of the plugs on the passenger side were really white and all 4 on the drivers side were pretty black rich. Whats up with that? I do know I have a slight exhaust leak at the header flange on the passenger side but would that cause this side to run lean? I am wondering if I have a vacuum leak on that side somewhere? Maybe intake? I checked all bolts and seem to be tight. Just wanted to get some opinions from the pros on what to do next. Thanks guys

[CipherLogic]

hey guys the other day I noticed what almost sounds like a lifter tick. Very slight. It increases and decreases tick revolutions with rpm speed. I first went to check my plugs thinking I might have one that was slightly fouled. No plugs were fouled but it was strange that all of the plugs on the passenger side were really white and all 4 on the drivers side were pretty black rich. Whats up with that? I do know I have a slight exhaust leak at the header flange on the passenger side but would that cause this side to run lean? I am wondering if I have a vacuum leak on that side somewhere? Maybe intake? I checked all bolts and seem to be tight. Just wanted to get some opinions from the pros on what to do next. Thanks guys

Single plane or dual plane intake?

[ian75c10]

Its a Wieman stealth and I believe it dual plane. But truly I am not sure. I just looked on summit and all the Stealth intakes for Chevy small blocks are dual.

[rich weyand]

You could have an air leak on the passenger side, such as from a worn throttle plate hinge hole in the carb body, or a fuel leak on the driver side, such as a leaking casting plug in the base of the carb (assuming Qjet).  Sounds more like a fuel leak on the driver side to me.

[BADAZ chevy guy]

Spray some WD-40 or starter fluid around the intake (slowly) and listen for an increase in RPM's That will tell you if there's a leak and where it is.