Just got back from Valdosta GA at the Outlaw Revolution race and watched a few Mopars running the class. ALL were running W9 headed smallblocks. One had a B1 BB but the smallblocks were eating his lunch. Also saw a late model Mustang running a W9 436" smallblock Mopar. He went 4.86 if I remember correctly. If you ask those guys they say the Mopar W's 7,8, and 9 are actually superior to the Chevy and Ford stuff.