bb or sb for my 72 dart swinger

A swinger won't fit much more than a 255 wide rear tire so a BB is way over kill if it is built. My drag racing buddy has a 440 swinger and it blows the tires bad.

I am in the SB camp on a Swinger. Move the springs, maybe some 4 link and a coil over with 315s (see MAd Dart's build), big hood and a BB is way more. Look at how much power IQ52 is getting on his "Pops engine" thread on pump swill.