HELP!!!

[Symyn240]

Ok, so ive got a 90 fb with about 220 on the od. It been running GREAT!! until lately. I noticed my speedo started being inconsistent, and the od stopped turning. Then it dropped to 0 mph and the engine light came on, it was doing this on and off for a while till it just stayed @ 0. That’s not all… In 3rd 4th and 5th I cant rev over 4k!!!! That tops me out @ about 70MPH on the freeway… not good. I tried all sorts of stuff like cutting the yellow and green speed limit wire, disconnecting the connecter that runs from the transmission up by the starter, and I removed the gauge cluster disconnected it and re-installed… no luck! Please help!!!