Ive had decnt luck buying stuff new and used on here lots of good folks on here

as for the packages stay away from them headers look at ssac's or speed daddy
tunes are all around the same price
go open cone its cheap''
search all the gp/gtp sites for a used dp/plog if not going with headers
colder plugs and tstat are cheap
do all that and you will be ready for a pulley drop