Help a Brother out! Open diff rear end

[2poor2drift]

I did a T50 swap on my automatic ae86, but the final drive is too high now, and my speedo is off (not the biggest of problems)
Im crusing at 70mph almost at 4,250 on my 4ac.

Dont need an expensive LSD rear end just a open diff rearend with a lower final gear ratio, that wont kill me on price

thanks guys, lmk!!

[2poor2drift]

bump!!