Pulley q

Hey would adding a 5% pulley on my 89 jepordise my seals or hg? It has 114k on motor and wanting to add some bolt ons but not sure if i should worry about more boost doing damage to my HG or any other seals. And no it wont be driven by a lead foot or "teen"

with 115k miles on it and the headgaskets haven't blown already they will most likely blow sooner than later, but adding boost, you need to free up the exhaust, you can have a local shop do it for you. just get at least 2.25 exhaust with some mufflers of choice, i prefer magnaflows with a magnaflow resonator, but once you do that you can up the boost without running into headgasket problems.