I have an 86 IROC-Z, nothing on this car (as far as the engine goes) is original. I put hooker comp. shorties on it when I had the engine out to be boared. I dunno about an 88 supreme, but I can the shorties in and out of my Camaro with little trouble. I also have headers on my 67' Chevelle, but they're long and I have to take the starter off to get the passenger side headers in and out, and the driver side headers had to come up from the bottom of the car. No matter what, headers are a pain in the ass. Like I said, cant picture the engine bay of an 88 Olds. They'll be a pain in the ass, but it'll be worth the extra power... good luck man