i just got a 91 and want to tune it up and throw some upgrades on it what should i start with.

 

What size engine? 2wd or 4wd? Manual or Automatic? What will you be using the truck for? What is the end result that your looking to do with the truck(rock crawler,drag truck,all show no go, daily driver, etc)? Your truck has the LA series engine so if your looking to add horsepower and torque then dont even do a tune up just get the stuff needed for the 5.2 or 5.9 magnum swap.you could put $1000 in a LA v8 and not even match the power of the stock 5.2 or 5.9 magnum.