i just got a 91 305 rs with a carb that use to be throttle body now i have no fuel gauge speedometer and my tach is reading at 4000 and up ... HOW DO I FIX THISS !!!!!!

 

Ah, you got a crappy conversion eh? buddy did it halfway, and backed out and left you with his shoddy work eh?

Fuel gauge - probably a loose connection behind the speedometer panel. Or just wiring at the tank. This has little to do with what's under the hood at all.

speedo - electric speedo in your year I believe. Again, probably a loose connection behind the cluster.

tach - probably same thing. Is the battery good? Does the car run?

 

I am getting ready to do this conversion on 89 RS with a 350. I to am having the same problem with my tach. You think tach is bad or just loose plug in?

 

yea basically its a cluster from a 90 and it has no wires except for 2 plugs in the back .. andddd i have NOOOOO interior dash lights!!! like URGHHHHHHHHHHHHHH