I just bought into the gp world and now i'm stuck. Don't get me wrong i've always loved this car, but I bought the worst one out there. Heres the story I bought it knowing it needed a fuel pump and transmission for 500. I ended up buying a factory fuel pump because a used one was very little savings, then I pulled the trans... I don't even want to tell you about that, so trans back started runs like crap. Cracked front exhaust manifold and It struggles to rev up. Is it a common problem to crack the manifold? I'm leaning towards a plugged cat, but I want to know if the cracked manifold is a common result of a plugged cat, or if I should just junk the car and stop putting money into it.