can i use a primestar/channel master 84E reflector 29.9"highand 39.5" wide to pick up fta sats will it work , i have a sadoun standard fss dual lnbf kul2 to use with it ?
Yes it will. Iceberg has one of those, I think...he'll see this and I'm sure tell you more. Primestars are excellent dishes. I have the bigger ones. 2 of the 1.2 meter and 2 of the 1.0 meter size.
You might consider using the original feedhorn and possibly LNB if you have them.
Should work fine.
Show us some pictures and describe them if you want to go that way.
Using your newer LNB from Sadoun is fine, too.
I'm sure you can come up with a simple way to mount it.