There are a few ways to go for mounts.
http://Www.powerbyace.com has mounts. Hooker headers make mounts, not sure on the availability new for them but sometimes they come up for sale here. To get them new if available check with jegs or summit. Be warned if you want headers the power by ace headers won't work with the hooker set up and visa versa. Power by ace is a bolt on, hooker is a weld in. Myself and others make our own mount set ups. If you look around the site you can see what you will need for a radiator. If you plan on good power from your engine plan on replacing the rear end. Some use GM 10 bolts, 12 bolts, Ford 9 inch, 8.8 rear ends, plenty of options, some require cutting down the length, a couple do not. As far as how hard the work is, if you are mechanically inclined it's not too bad.