Speedo Question

[94 six speed]

I have a tech question. I have the 115mph speedo in my car and I want to go to something that reads higher. I was wondering if anyone knows if I could just get the factory 150mph out of a 93 to 96 T/A or if there is an aftermaket soultion. I have already tried Granettli but they ony make them for 1997 to 2002. I do realize that i might have to get a speedo shop to recalibrate.

[02z28ls1]

is that a mechanical odometer or a digital one (LED)?You will have to go aftermarket add on if it's mechanical I suspect-maybe someone else has a better solution-my car is too new to worry about that,I agree the 115 is a little too low