Oiling mods have been done along w/ 7 qt. pan. Probably wont see much more than 6500. Mopar drag racer/rebuilder up this way w/ stroked 340 that he turns 7500 gave me his oiling mods. Check him out if interested, Bob from Outrageouslyvintage.com Vintage Mopar only machine shop. He is the one I had do my heads. He could have done alot more port work but i think it would have been an overkill for a street motor. All other machine work and balancing was done by my buddy I work with @ his machine shop. Its kinda nice knowing 2 guys w machine shops.