Both keisler and classic make conversion kits that pretty much bolt-on. I still recommend you make your cross member removable (if you have a 4-speed car). Even though it is possible to install the 5-speed with a fixed cross member it's such a pain.
Or if you're prepared to spend a few more hours you can get a universal tremec and do the mods yourself. Going that route will save you close to $1000. I did my own conversion a few years ago and the total came to $2k.
Some pics of my install:
Tremec Install