heres what the spec that P.E had on the systems two when they sold them

Balanced 88mm cast iron allow crank
Forged rods
Hi-duty big end and main bearings
fully floating bronze small ends
83mm German Mahle pistons
Goetze piston rings
high flow oil pump
Stage three head gas-flowed with bigger inlet and exhaust valves, valve seats opened up and cut to tree angles and enlarged reshaped ports, bronze guides
power+ camshaft SX428T

mark