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I did. Got the flowtechs, still did not fit right but were way better than the hedman's. Had the exhaust shop bend the drivers side out a bit because the collector was to close to the trannt pan. After 800 bucks into the exhaust. The truck sounds great!
I run Flowtech 12560 with my 460 using L&L mounts, ZF5, NP208. Fits fine and they're cheap so good enough for what I need. Think I might be able to squeeze a NP205 front shaft past the collector if I do some creative bending.
I have been running Stan's Headers on my 84 with the 460 and ZF without problems for about 4 years with Minnesota winters. They are built heavy duty. I used their thick copper gaskets and they seem to work great. I lost one gasket on the drivers side because of header bolts that kept loosening. So I would definitely recommend a set of locking header bolts.
The only problem I had with fit up at the time was that I had to modify my sway bar bracket and maybe clearance the frame a little bit. But the frame has also been beat badly since it is a plow truck.