https://www.ebay.com/itm/THE-BEST-Mopar-BIG-BLOCK-22-Wide-ECP-Aluminum-Radiator-REAL-COOLING-POWER/263230865287?hash=item3d49c83f87:g:w7sAAOSw4CFY4qsz&vxp=mtr
I used there 26" 2 row in an A body with a shroud with my 511 filled just about to the top and temps were 185-195 street driving last August. ECP radiators are very good.

http://www.youtube.com/watch?v=aIxaesJ190U

http://youtu.be/lCZAaN7fFLg