As to what the title says where is a place to source a double roller timing set for the 8.1. Also when buying a set what version is it going to be since there were 3 different versions and only the latest has cam sensors available still.

Not sure you can make that work with the cam sensors and how tight everything is. You can find the early black cam sensors if you search on eBay and such. I had two spares for my 2003 496s which I gave to the new owner. I also have an extra black cam sensor (same piece) for my 2003 Silverado 2500HD with the 8.1L as well.

What are people doing that are building these engines for timing sets. Where is the stuff being sourced do I have to go oem thru Volvo to get it.

OE replacement you can get thru GM.

Googled for aftermarket roller and found this, read the review as it may be helpful:
https://www.summitracing.com/parts/c...77-1/overview/

Also, not sure which cam sensor and ti,img chain cover type works with it. Again. I googled that. do your homework.
http://www.raylarengineering.com/vor...aft-gears.html

Yea I found that one and that is the only one I found, I guess you would just have to buy it and go from there on which timing cover and sensor too get.

Apparently Raylar are about the only people to see whenever you need stuff for this motor. In this case they don't even sell the stuff. But they provide the necessary information.

Tyler crokett is a 8.1 guru also from my understanding

I just felt it was good of raylar to put that info out there when they don't sell any of those sensors or gears.

Oh yea Raylar has a ton of information on his website that's for sure I have read thru it alot.

If you are keeping your current crank and cam sprockets and just want to upgrade the timing chain, then a standard aftermarket big block chevrolet 66 tooth type true double roller timing chain will work just fine. Cloyes, etc.