302army187

the one's you got from ford racing is from the later mustangs, SN95's i believe. with stiffer bushings.

that's more then enough.

tinman

What are you using for a drive tire?
What the rear axle gear ratio?

68CSTANG

2x10.5 MT ET Streets (tube type)
4.10 gear

302army187

you need head in those tire's. you have alot of gear, and a ton of torque on the bottle, so its understandable.

heat the tire's just for a few second's and im sure you will get the result's you want.

91 Fox 331

yeah the uppers should be fine. Im running all stock upper and megabite lowers with a 245-55-16 street tire runin 1.8x 60ft but i spun the tires through first and second to heat them up and i was only makin 301 hp at 5600 and 311 torque at 4600.
with those tires and that much power 1.6s aint a problem if they got heat in them.