different 318 question

Something else is bothering me;
To be spinning 3000 at 60 mph,with 3.55s, you would have to have really small tires; just under 24" tall at zero slip. A 205/75-14 is 26.1, a 235/60-14 is 25.1, a 245/50-14 is 23.6
Or the TC is seriously slipping.
Or the tach is lying
Or the speed-O is out.
Or that chunk is not a 3.55,lol