I found a pair of '79 headers for mine. They fit correctly and aren't joined by the crossover pipe in the middle. Try to find a pair that come with the metal gaskets and the nut rings (the metal collar that holds them to the engine block) since the '79 has a different style than the '81. Also, you'd have to hack the '81 exhaust if you want to get the collars off. I think I paid around $30 off ebay for the pair. They fit correct when you use the gaskets and nut rings that are for that year. Check my thread history under first mod, it has pics for you.