https://www.miamicorp.com/catalog/shop/Automotive/Headliner/OEM-Headliner/dept-5SK?a=1&c2=NAV
This is where I bought my material but I don't know what to tell you about a source for the backer.
I had trouble finding a new hydroboost a couple years ago but did find one at O'Reilly eventually. Mine was leaking into the cab which seems to be a somewhat common issue.
If they are actually straight and round they are worth a little bit.
Edit: Suckered into replying to an old post with this new format. I feel like a bit of an amateur right now.
I'm with you! What I also don't understand is people who insist on putting big motors in their trucks, I mean they can only go so fast before it's illegal so what's the point?!? I just shake my head.
Are you planning on hauling with this truck? My setup was different, it has blocks to correct pinion angle that just go under the axle and rest on the original spring perches. I'll look to see if I have any pictures but I think I may have ended up with that setup because I have a Dana 70.
As...
I have been looking on and off for three years and had zero luck. I contacted a member on here a couple times via private message who I know took his off and never got a reply. If you find an extra set in your search let me know, I'd buy another set if they are available.