[Morris]

Smash

Spicer 1310 series u-joint is only made to handle 300-350 Hp.....

Spicer 1330 series u-joint will only handle approx 400-450 Hp.....

Spicer 1350 series u-joint will handle torque up to 600 ft lbs or more....

It's your safety....and don't think for one minute that a 1310 u-joint is stronger then a 1350......

Morris