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You’ve made a bunch of changes to the engine. That cam if I remember is around 241degrees at .050” it will be some what choppy especially in a 383, the vacuum will fluctuate some. How did you set the preload on the lifters? Hot cold. The aluminum heads have a different growth rate than iron...

I’m no expert but I’d remove the valley pan gasket, set the intake on and see if I could get the bolts to start. If you can get the bolts in, left and right side, you should be able to check the intake face angle to the heads as well as the gaps to give you an idea of where you need to be. My...

Agree with this. But may not hurt to pull pushrods and set rocker shaft assembly on pedestals to make sure there isn’t anything to prevent them setting down on the heads. After verifying that, put push rods back in place. Check geometry and proceed.

My build 440 lunatti solid roller 237/[email protected] .566/.577 lift. Eddy 84cc static 9.9-1. MRL recoommended 89 and up. I would contact your builder and ask them what they recommend. Safest way to go in my opinion.

Might try to contact Devane to see if they've got recommendations. You've got all the info they may be able to put you onto something.

What type of fuel supply system are you running? Also @ 3000 rpm I'm assuming your pretty well putting your foot in it, so if the carb is some type of Holley design does the secondary side have jet extensions on it? After three different carbs on it doing the same thing I'd be leaning towards a...

I had a 99 Durango 5.9L. The way the systems were wired in that, the front O2 sensor heating circuit could fail and cause some weird issues. I don't remember for sure but it tied into TPS and crank sensor if I remember correctly. It would NOT cause the Check engine light to come on and wouldn't...