This guy is selling an Edelbrock header back system off of an 1984 355 iroc and wanna make sure it will fit my 88 tbi, is there anything i should kno before making offers?

 

They will work fine with your motor. There are only a few things that will not make them a true 100% bolt on. The y-pipe fitting will not mate to your stock cat and you may lack a few support brackets that are required for your front engine accessories. Don't let these deter you from a good deal as they are cheap to rectify.