For 9" Ford Econo/Comp Dragster (solid mount), wheel to wheel of 31-1/8"

For 9" Ford 4-link (with 20" centers), wheel to wheel of 36"

For 12 Bolt Econo/Comp Dragster (solid mount), wheel to wheel 29-1/8"

For 12 Bolt 4-link (with 18" centers), wheel to wheel of 34"

For a larger list of the most popular modular configurations with flange axles, see page 52 of our catalog. For series II floater axle configurations, see page 53.