Wheel Base Spec's 64-85 also weight specs
 

Specs for Ford Mustang

All measurements are in inches unless otherwise stated.

'64-66 '67-68 '69-70 '71-73 '74-78 '79-85
Wheelbase 108 108 108 109 96.2 100.4
Track, frt/rear 56/56 58.1/58.1 58.5/58.5 61.5/61.5 55.6/55.8 56.6/57
Width 68.2 70.9 71.8 74.1 70.2 69.1
Height 51 51.8 50.3 50.1 50.3 51.9
Length 181.6 183.6 187.4 189.5* 175 179.1
Curb weight, lbs. 2860 2980 3625 3560 3290 2861
(289) (302) (428CJ) (351CJ) (302) (140)**
Wt, dist., % f/r 53/47 56/44 59/41 56.5/43.5 59/41 57/43***
(289) (302) (428CJ) (351)

Notes:
* 193.8 in. in 1973
** 3075 lbs. with 302
*** 59/41 with 302