So you bought the intake off of ebay and looking at the intall kit for $750, or was this for everything? I just installed a ported one two months ago. It wasn't too bad. You can get the alternator for $120 from Autozone. You'll also need the throttle cable, $30, and the cruise control cable, $25. There are a couple of hoses you'll need but you can get them at the parts store. I got the necessary valve covers but since they looked like a pain in the ass to remove, I just cut down the neck of my current ones and bought another cap. Bill Putman on modular depot has a compete install write up. Right now my intake is off as I'm installing another bullit intake that has a custom nozzle kit on it. How much did you pay for the intake? I'm trying to see what I should sell mine for.
Let me know if you have any questions or would like any pics since mine is off right now.