I have run the conversion ones and had zero problems so do not see where 2 kind would be different.
As long as the shaft it self is balanced that is.

[img]https://i234.photobucket.com/albums/ee87/fast340six/sig%20pics/2840886-340SIX-1.jpg[/img]
VP of the MPM in New Orleans
73 Dart Sport 340/ 70 challenger vert. That may still get built, If I live long enough