if i take a EB-ED instrunent cluster out and put a custom dial face in and take the needles out and put them back in with the new faces will that put the speedo and tacho out or not or will it be ok

they'll be ok if you position them correctly. ie spin them round a bit untill they stop at the 0. ull know what i mean when you get there

just be gentle when doin it...if if doesn't feel like it's gunna come with ease don't force it .. also clean all the conmection point with some conact cleaner