i just bought an 85 IROC, and my buddy told me the valve seats needed changed, I cant confirm this till atleats Oct, when i get home. I was wonderin how big a pain this would be, what all do I need to yank, and "about" how much $$$ am i lookin at and time???

 

seats or seals? seals can be replaced without removing the heads with an upright spring compressor. seals are dirt cheap. if the valve seats are bad you need to take them to a good machine shop and let them rework them. usually if no valves have to be replaced it's in the neighborhood of $150 bucks amd a couple days depending on the shop. sick