Magnum heads on a 74' 318 LA

The Edelbrock heads are good for .580 lift, and my cam is .574. We've done two sets of lifters, two set of pushrods, nothing bent or broken, but it's really noisy. I also just discovered he left the plug out behind the oil filter plate, so I was not getting filtration. Added the plug, but still nothing at the top end. I'm just going to pull the engine and take it to a different shop and basically start over... tired of messing with it, he did something wrong. Well, he did a few things wrong that I know of - now it's time to find out what else he did wrong. lol