It comes only in a fixed 8 5/8" Carb 'center to center' base which is pretty much the standard center to center of most 'Dual Carb' blower adapters made for normal 5 1/8" neck carbs and is the same distance when 2x 600 holley vacuum secondary carbs are mounted inline with only about 1/8" gap between them.

The base is drilled for fittings and the kit comes complete with dummy black anodized distribution block and dummy hardlines with anodized tube nuts just like a real Enderle Injector.

The scoop will mount to 4150-4160 Holley, Demon or Edebrock Performer Dual Carb setups mounted inline or sideways and with choke horn removed