i used a set of b-body headers they were 1 7/8 with a 3 inch collector and i modified em,they ended up fitting good after several installs and uninstalls and cutting and welding,but i got it done for under a 100 bucks and the used headers were 75,so i guess thats a pretty cheap set of headers,they were hooker i think and it didn't take much for the passenger side,but the driver side sucked,it had a manual steering box and it was a 68 dart