Holley 390 with Clifford intake on a 1979 258

Okay, thank you. I will check my fuel pressure tomorrow at idle and under load. I installed a fuel pressure gauge. Also, the Jeep used to have a charcoal canister that was hooked to vacuum and vented the tank.I do not have this hooked up anymore either. I read that it wasn’t needed. Could this be part of the issue? Or maybe just rich, I had a performance shop tune the carburetor, and I know they put a wide band in to tune it because I welded in a bung for them. It shouldn’t be so rich unless something else is going on.

Okay, I’ll cap the old return and vent line that went to the canister. Should I get a vented gas cap or just leave it non-vented?

Thank you sir. I’m driving it to work in the am so I went ahead and took the rubber ring/grommet out from under the cap I have now. The cap still closes on just let’s air in and out easily. Essentially vented :) we will see how it goes with these changes and I’ll report back on fuel pressure as well.

I hope so. Something so simple could be the fix hopefully. It’s a strong smell though. So we shall see. When I changed to a header I also did the exhaust because the entire system was toast. I went straight out the back drivers side and have read that down and out at a 45 degrees behind the back wheel would of been a better option. That could be a partial contributor to the fumes. One step at a time.

I will try to get in contact with the shop to see what jets they put in it.

Okay so the raw fuel smell is almost completely gone. Now I just have exhaust fumes running into the jeep. I think I’ll reangle that exhaust tailpipe to come out the side behind the drivers side tire instead of straight out the back. My last issue (for now) the shop that tuned the carb set the idle at 500. Sometimes when I come to a stop sign I notice it may even at 400 and the jeep feels like it’s as low as it could idle without stalling. What should my idle be set at. My curb idle (terminology?) And if they set it too low does that mean all jetting/tuning/timing will have to be adjusted to match? I’m starting to wonder if im getting all the performance I should be with the intake and carb I put on the motor because if the idle is set wrong who knows what could be overlooked. Secondaries, vacuum advance etc.