well, your 88 has a throttle body injection on it. They sell intake manifolds, headers, exhaust everything for them. In stock form the trucks are super weak, but VERY reliable. To tell you the truth, i wouldnt even mess with it..Wait until you want to go through the engine before you do it, unless you want to take and have your tbi bored, custom chip burned, etc..the stuff you do wont be for much,,the stock tbi unit only flows very little air. The heads that are on the engine are some of the crappiest flowing heads ever made. I would just leave it alone, until you want to go through the whole thing, and maybee step up to something different on the injection side. I mean, sure you can put some headers on it and exhuast, maybee a tb spacer and it will help a little, but i wouldnt get too crazy as far as intakes etc..too much work for not much gain..obtw,,i have an 88..i took my tbi off and put a holley 4 barrel on it after i rebuilt the engine..