I have a polished 12-71 Mooneyham blower, stripped and hard anodized rotors, built to allow the use of blower or mag with no offset.
Includes a std deck polished intake manifold, idler pulley, two pulleys and belt along with crank hub (I have either internal or externally balanced hubs).
No carb adapter included, so you can choose to run 4150 or 4500 carbs at your discretion.
Prefer local pickup in Parker, AZ
I do have stainless hardlines (pretty sure for 4150 carbs) with AN fittings, as well as Enderle carb linkage, not shown in photos, for additional cost if they would work for your application.
This was set aside to build something for myself, but I think I would prefer to run turbos if the right boat comes along.
Here's a shot that shows that a distributor or mag will clear (fine distributor with broken cap not included)