Outer Limits 4x4 Board

Hi i am putting a 4" suspension lift on my 1993 leaf spring hilux, i am also moving my diff forward 25-30mm will my tail shaft have enough travel?

Also i was told not to get tail shaft spacers but to get it lengthened???

any ideas would be a huge help

Cheers

definatly needs to be lengthend or run a high pinion