1969 GTS true H code 727
1968-9 engine codes
Fifth Digit:
Code Engine
A 170 cu. in.
B 225 cu. in.
C Special Order 6 Cyl.
D 273 cu. in.
F 318 cu. in.
G 383
H 383 cu. in., Hi. perf.
J 426 cu. in. Hemi
K 440 cu. in.
L 440 cu. in., Hi. perf.
M 440-6 cu. in.
P 340 cu. in., Hi. perf.