Strongest Spline?

[MidTexCuda]

Sorry if this is an ignorant question but what is the strongest mopar spline and shaft size?
is it the 1 3/16" 18 spline?

 

[67Dart273]

Yes. Pretty much came only behind some 440s and hemis

 

[MidTexCuda]

that's what I needed. thank you

 

[RustyRatRod]

Generally, the more splines a shaft has, the stronger it is.......but Mopar is one exception. The 18 spline is stronger since it has a larger diameter.

 

[MidTexCuda]

ok now what are the thought behind 130 tooth and 143? is one heavier?

 

[Dartnut]

The larger one is for a bigger clutch.
10.95'' scalloped vs 10.5''.