I have never installed a hot tub or worked on one. But I have worked on HVAC and plumping systems and I was a carpenter I dont see it being too much of a problem. What i do need how do I find out what manufactor shell and how do I determine the number of gallons. So I can start matching up hardware. Thank You In advance

The manufacturer of the shell is pretty much immaterial. All you need to do is take stock of where you're going to mount the tub first and foremost, then the main electrical installation, (plan on 6 or 8 gauge 3 Cond/w-Gnd).

Then:
1. How many holes are already in the shell for jets?
2. Does it already have jets installed and what are the hose sizes?
3. Does it have a filter built in?

In your subject line you said you 'had shell'... but you didn't give much in the way of specifics. More info and perhaps a picture or two uploaded will quickly facilitate this!

Thanks Ok I will get some data together on the tub I do have a filter and heater but they look to be very old and were cut out from the system it looks like with a hack saw. so basicly I have a shell with no jets no filter and no pump but its a start. I will get some images asap so I can get started on this before summer ends