well gude performance sells a power package that includes a cylinder head intake manifold throttle body, and cam it costs bout 1600

Crower sell performance connecting rods, excellent for nitrous
they cost 167 per rod for the steel billet, titanium rods are availible but I dont know the price

Arias sells pistons for high rpm or boost applications

now if you have an auto trans your only option is Level10 tran rebuilt kits and performance torque converter
converter is 500
and the rebuilt kit is 300

the links are
http://www.crower.com
http://www.ariaspistons.com
http://www.gude.com
http://www.levelten.com/store/import/import_pts.htm