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365GT4 2+2 engine:
 Type Colombo 60º V12
 Type number F 101 AC 000
 Capacity 4390 cc
 Bore and stroke 81 mm x 71 mm
 Compression ratio 8.8:1
 Maximum power 320 bhp @ 7000 rpm
 Maximum torque 318 lb ft (44 kgm) @ 4000 rpm
 Oil pressure 78-92 psi (5.5-6.0 kg/cm²) @ 6800 rpm
 Cylinder block and head Light alloy construction
 Timing gear (per bank) Twin overhead camshafts
 Valves 2 valves per cylinder
 Carburettors 6 x Weber 38DCOE 59/60
 Ignition Twin Marelli S138B distributors
 Twin Marelli BZR201A coils
 Firing order 1-7-5-11-3-9-6-12-2-8-4-10
 Spark plugs Champion N6Y

Valve Timing
Valve timing should be measured with a clearance of 0.5 mm between tappet bucket and the camshaft lobe.
 Inlet valves open 43º BTDC
 Inlet valves close 38º ABDC
 Exhaust valves open 38º BBDC
 Exhaust valves close 34º ATDC
 Valve clearance - Inlet
                           Exhaust
 0.10 mm to 0.15 mm
 0.25 mm to 0.30 mm

taken from 'Original Ferrari V12: 1965-73' by Keith Bleumel