I saw that you picked that LS1 up over on TeamCamaro. Nice engine!
dondb is doing a similar swap into his '69 on TC. He's using an LQ9 (iron block 6.0) with LS3 heads, but a lot of the swap parts will be the same as yours:
http://www.camaros.net/forums/showthread.php?t=251593
I have the tanksinc tank with a walbro 255 and Corvette regulator. If you aren't going to track it full time, this is a common setup and very reasonable cost.
Definitely decide on which frame mounts, motor mounts, adapter plates, transmission x-member and headers you want to use. They all work together. If you try to piece it together (like me perhaps), also buy a 5lb sledge hammer, as you will have to beat on something to make it fit. The new Holley/Hooker setup looks like it's going to be a good fit for most, but there are plenty of other setups out there as well. Once you decide on the headers, that will dictate what other mounts you'll need.
My build is a lot different since I swapped out the cam, heads, intake, TB, fuel rails, injectors, trans, clutch, shifter...........but I consolidated all the info into one LS swap thread on LS1Tech.com. There are a lot of useful part numbers in it, and it's all specific to this swap. The regulator number is in there, how I tied into the hard fuel line and the part numbers required, hose #'s, water pump #'s, etc.:
http://ls1tech.com/forums/conversion...67-camaro.html