This Dual L-Panifold is machined to fit stock 74” Panheads with o-ring intake ports or earlier 74” heads (knucklehead or Panhead) with o-ring adapter nipples converting the plumber style heads to o-ring. Those adapter kits are available on this web store.
The Dual L-Panifold has completely divorced runners so each carb will be feeding each head independently. The carb mounting flange will accept any Linkert carb with the standard 4 bolt pattern. These are very limited! I only have a few castings of these specialty manifolds.