Oil Pan Clearance

I asked this question in another post of a different subject, but id like to get more feedback, maybe from someone that knows first hand...
Have a 340 in a '75 Duster and bought a new moroso 8qt pan cheap...
I measured its depth and its only about 2.5" deeper than stock pan...
Am I going to regret installing this ground clearance wise?
Does it interfere with the mopar performance headers(which are crap by the way...DONT BUY 'EM!)?
Is it going to hang any lower than the headers?