iron ds hp or 60ft limit.
Now the steel LT1 shaft is pretty strong. I've run many low 1.6 60ft times on it. It is 2.5 inches in diameter. Just for extra insurance I upgraded to the steel LS1 shaft with better U-joints. It is 2.75 inches in diameter. You can find them in automatic 2.73 geared LS1 F-bodies.





