Some additional stuff I have saved. These are the special engine assembly codes.
T = Truck
R = Regular Fuel
P = Premium Fuel
LC = Low Compression
HC = High Compression
MP = Maximum Performance
HP, HP2 = High Performance, HP2 = 2nd shift
X = .001" Undersize Crank
X = .U10" Undersize Crank
Diamond = .008" Oversize Tappets
OS = .005" Oversized Valve Guides
X = Oversize Valve Guides
S = Special Engine (possibly warranty)
SP = Special Engine TA340 or police and seen on big block a-body engine also
WT = Water Tested
H = Hemi before displacement ex. H426
A = .02U" Oversize Cylinder Bore
B = .010" Undersize Main and Rod Bearings
E = Cast Crank
H = Standard 4-bbl V8
