i got myself some hedmen headers but they do not have fitting for o2 sensor. all ive got to do is weld on an o2 sensor fitting correct? is that all i need to make them fit? i think they are not shorties either so will i have other probalems as well? they are used got them for 30 bucks

 

Yea you can weld in the fitting the 02 screws into,get one at the parts store . You need more than that to make the headers fit. You' need a header y pipe. And headers are always a problem. If there the right ones for your make and model should'nt be to bad though.