hey rick,
if i was you i would shop around at some of the smaller shops in your area. i got the exhaust on my 61, 235 stock manifold single pipe, done for $200. i had some people quote me up to $400 but I hunted around for a few weeks and found another guy who needed my business more and we struck a deal. anyway, i always have more luck when i go through the smaller guys. they typically care more about their customers, cause they have fewer, and in my experience their work is equal to larger shops. i have been burned once or twice, but in the long run the small shops have been a better resource than the big boys.
that being said, if i had a truck with a 402, i would find someone to run me a nice set of straight pipes, w/ no mufflers, that dumped on each side in front of the back tires with a cool slash tip. that would look pretty trick and it would make the job cheaper because their would be no mufflers, and a lot less pipe. just my $.02
