360 into 64

I just found a 360 to put in my little 64 barracuda. Just wondering if anyone has any idea of how to find cheap headers or manifolds that fit. I have 273 manifolds (but don't want to wreak them by reaming them. I don't know if it would work anyway.) Not sure if there is a difference in shape but I have power steering.

Thanks for the help
Miles
Maybe this will help,pretty cheap,
Summit Racing SUM-G9040 - Summit RacingĀ® Headers