Join Date: Aug 2000
Location: jackson, michigan
The 8K tach is either an assembly line anomaly or previous owner swap out.
Every factory S-code I've seen (with a tach) had a 6000-rpm unit.
The 8 grand tach you'd see on Shelbys and 428 Mustangs.
According to other posts here the 8k tach was used in '68.
69 Mach 1, 351W, T5, owned for 32 years, 03 Mach 1 Azure Blue, 65 fastback, 289, C4 (son's), 67 fastback, 289, C4 (wife's)