Welcome to STF: so you don't disappear like the other Mr. Hoffa did, is: "desert/enduro buggy" what you plan on doing with your "long back" rail? You didn't say where you are going to ride at (roughly what part of the country are you in). The word "endure" leaves a lot of room for 'use and abuse' open.
The style of rail you have is a pretty common one occasionally seen up for sale so it could be made by any one of several companies. It is a nice looking rail and it looks like you have a fairly good start for a nice toy depending on how you plan on using it.
You will find that we are pretty good about spending other people's money so: ... is there a rough budget and is there a time line? Also, how are your building skills as buy and installing is a bit different than designing, making and installing.
You have a ball-joint front beam which will limit front suspension travel to the 4" to 6" range; the travel limitations is in the ball-joint itself. There are racing classes that require BJ beams so you can have a lot of fun with them as long as you don't think you need more travel. A King and Link (K&L) front beam with some easy mods can get you ~ (roughly/about) 8" to 10" of travel using stock arms. The K&L spindles are not the strongest so how much pounding do you plan on putting your rail through? The distance between upper and lower torsion tubes is different between the BJ and K&L beams, something like 1/2" if I remember correctly but it should be fairly easy to make things fit. If you are going to be rough on the car then I don't recommend using an Aluminum beam.
Your rails rear suspension is 4-joint IRS which is good. Even with stock arms you can get some decent travel out of it. As far as shocks go, again the amount of abuse expected determines shocks as does the arms themselves and if you are planning on using the torsion bars or coil over shocks like Fox or King.
Your engine choice sounds pretty good as does the transaxle choice. With the stock suspension you will have some parts to buy. Here is some basic things to keep in you favorites list to refer to every-so-often:
http://www.blindchickenracing.com/How_t ... nd_cvs.htm
If it were me I would take everything out of your rail and do a check over to see just what you have. With all the distraction gone thing may look a bit different and probably for the better too.
Make yourself a notebook and keep a log including receipts (you never know...). Write out you plans and list you budget to compare to when done (some fun to read it when you are though). Remember that changing your mind about directions to go is OK as long as it isn't too much in too many different directions.
It is also good for the next owner to know what has been done when the rail changes hands.
Keep your build up-to-date please it is fun to follow builds and who know, you might be helping someone else.
Lee
