IMHO just save up your money and buy an IAP stage 1 kit.... it comes with everything you need to be turboed and nico members even get a discount...
but if you really want to go cheap, buy a weld-it-yourself manifold from
http://www.jgstools.com , a internal waste gated T3 turbo from
http://www.turbocalculators.com , weld up yourself a downpipe, buy an IC from
http://www.johnnyracecar.com , make yourself some piping, buy a walbro fuel pump, a set of 370cc injectors, a 300zx maf, and a SAFC.... good for probably 300hp.... but thats only if you can weld
dont buy SSAC anything, keep away from ebay crap, and your good to go...
oh and btw turbo2nr, 245's out back ain't got nothing on 275's Out Back