I just did a V8 swap into my 93 fox body.I ended up having to get a 1993 computer harness and power harness.I've got the car running now but my instrument cluster doesn't work.I've checked all my grounds and they're all good.My tach is working but it doesn't look accurate.I forgot to mention that the cluster that I have is a 140mph one out of a junk car.I don't know if it was working or not.I also tried my 4 cyl cluster and it does the same thing except for the tach being off.If anyone has any answers,I would greatly appreciate it.