Serial Number 20
270ci DOHC Inline-Four
One-Piece Cylinder Block & Head
Polished Aluminum Camshaft Covers
Gear Towers
Aluminum Crankcase
Crankcase Breathers
Finned Block & Crankcase Side Plates
Bedix Scintilla Magneto

Wooden boards that block off the intake and exhaust ports bear handwritten instructions for carburetor adjustments and adding oil.