Wished I had GPS technology back in late 80's, but all I can go off of is numbers.....
My 66 Cuda with a hot 273, 904, 7 1/4 rear with 2.76 gears and 235/60/14 tires running full throttle down a long open road at 7k RPM. Had friends that used to top end challenge the 66 all the time as teenagers when we got closer to home town so if anything broke we didn't have far to go.
