First off great site.
Ok what I have is a Dish 500 system with Legacy dual LNB's running 2 301 receivers thru 2 sw21 switches. I have a new 322 receiver to install and need to know all the upgrades to equipment that i'll need. Thanks

All you really need is a proplus twin.

Ok thank you I will look into that option, thanks

It does look like I'll need to change the end of the arm on the Dish to accomadate this LNB am I correct? I'm trying to do the research myself but just gets confusing trying to look for this stuff.

Proplus twin bolted right up, fixed problem, up and running. Thanks so much Tech. Thread closed :)