#1, it's what everyone wants (deserves) to see under the hood of that historic type of car, the factory looking 2 x 4 is just 'dead-on' RIGHT!! It's part of the legend.

The 66-67 'plain jane' B body hemis have a mystique and a 'cool' all their own....really like no other mopar. So to not use the in line 2 x 4 would be like putting a tunnel ram or a big single /dommy on an original Max wedge car. Sure, It might work better and make more power...but in that kind of car who really cares?

It'd be like the image of a 35 yr old Sean Connery as Bond 007 in the classic black tux....but wearing a pair of Nike's