just wanted to get some opinions on these two manifolds. Would I see a noticeable gain from switching to an edel airgap? Thanks for any help

With your engine mods, I would suggest the air-gap...even more so if its gonna be a daily driver. You'll get better low end torque and overall better driveability, anything besides advantages I mentioned is not worth it for a true daily driver.

I don't know but i'm swapping from as stock 346250 Iron Q-jet intake to a Weiand Stealth. I have a 1" carb spacer/carb adapter under my Holley 600. Getting rid of the adapter alone will probably add some power, due to the better flow characteristics.

I will let you know how it goes!