Working with the TBI system isn't as difficult as some think. I have the same truck/engine/drivetrain as yours. I installed Flowmaster full length headers with 2.5" couplers. 2.5" exhaust pipes from front to back with a pair of Flow Master high flow muffs (no cats). I moved the O2 sensor to the coupler on the pass side collector. Don't forget to plug the air pump holes in the heads, just below the exhaust ports!She sounds good and breaths a lot easier over the stock single 1.75" exhaust. The thing to watch when selecting headers is the clearance between the front runner and the vacc actuator on your front drivers side axel. I repacked my leaf springs for a 2" lift and that solved that problem.(and YES, you do have to re & re your starter to install the headers). I used an oversized K&N filter and built a ram air system. I moved my rad overflow bottle and punched a 4" hole through the front wall just behind the grill and beside the rad. It turned out pretty good and feeds the engine fresh cold air. Don't forget to put bug screen over the inlet. You have to disconnect the fuel tank vent line. If it's left venting into the air cleaner you'll end up pressurizing the tank. The /88 318's where over kill on the antipollution kling-on's. I tore ALL that crap off. The EGR was replaced with a flat plate and sealed with (O2 safe!) silicon sealer. I did the same with the 3 port plate on the front of the TBI. The 318's are hard on stock timing chains, replace your stock set with double roller chain set! Power tune your timing, stick with the same octane fuel and keep advancing the timing untill she starts to ping, then back it off a little. Tranny - Mine shifted like mush. I installed a B&M shift kit, she shifts harder and feels more positive. Instramentation - I installed a vacc gauge and tack to keep an eye on things. The vacc gauge shows you how far you've got your foot into it. These are just a few things I've done. I want to install a high rise intake man and while I'm at it, go with a new cam. Comp cam's has a nice "RV" cam but I'm not dropping $250 for one. After some research, I discovered that the stock cam out of a /93 318 will fit the /88 and is pretty close to an RV cam. Pick up a Hayn's book for your truck and keep notes in it. It's a bible with all the testing and building tips. After all this who-haw, I've tripled my gas mileage. I do a lot of long dis hwy running. When I first got mine, it sucked up 1/2 a tank, one way. Now she sips a 1/4 tank round trip!!! Hope this helps, oh, and don't forget, after every mod, no matter how small, reset your ECM!