hmmm...I've seen that motor before...see my list of cars

just to let you know a few of your motor specs are off...regardless a nice build!!

what rear end are you running in the car? did you get a 4.44 rear end with the motor/trans?

The manual speedo bolts right to the trans, trust me...then you pull the psotive signal off the back side of the gauge cluster (like oem) and that signal runs to the ecu...no limp mode issue
are you making the car rhd? if not you will need to fab a few things for the turbo to clear our brake master cylinder.