Gear shift arm length?

[Rustyhama]

True or false?
1. The ideal length for the gear shift arm (stock part cut down) is the same length as the short rear set arm from pivot point to pivot point.

2. The cut down gear shift arm should always be parallel to the short rear set arm.

 

[xb33bsa]

you are on the right track but the number one consideration is to try to keep a 90 degree angle at each end, this naturally makes them paralell
the angle of moment, pivot to rod end to rod this gives equal travel and leverage either shifting up or down