GT Avalanche 1.0

englishmx Posts: 35
edited January 2010 in MTB beginners
I have a 2007/2008 GT Avalanche that I am buiding from scratch. Having great fun sourcing components from eBay but am unsure about a couple of sizes, can anyone help...

Seat post size and seat post clamp size
Bottom bracket size, and do I need a particular chain set or are they all compatible

Thanks in advance