Engine features: 4-Valve cylinder head, SAE#3 Bell house and S.W.-L.S. governor. Engine configuration from flywheel: Exhaust, blower and governor on right, starter on left with right hand rotation. Test ran 2-21-20: Good runner with 50-55 psi oil pressure. Sweet runner!! Starts and runs great, no smoke or excess blow-by. See it run on video!! Engine is missing some fuel lines and filter housings.