I want to replace my guages in my 81 blazer. Has anyone done this before? The guy that had it before me put in an oil pressure guage by cutting a hole in the plastic cover and grinding out the back. That guage doesn't work anymore though. But, the guage cluster is already ruined anyway, so is it a hard thing to do and is there a speedometer out there. Last thing is, my truck doesn't have the needle telling me what gear i'm in. What do I look for to fix that? Ok, this is the last thing. My steering wheel wobbels all over at the point of the tilt set up. Someone told me to take the wheel off and just tighten some screws to fix that. Anyone else done this? Anyone else have an idea that it might be a different problem?