[Axle07]

I took my 77 T/A to a muffler shop friday to get a new exhaust system put in because the pipes were old and rusted out. Well I drop it off and the guy calls me about 2 hours later telling me he started but the bolts in the exhaust manifold are about to break off so he asked me if I wanted him to just patch up the exhaust so it will hold for a while and I told him to. I was wondering if i should try to get these bolts out myself and go ahead and get some headers like I was planning on anyway. If so what would be some affordable ones?
Thanks.