$1500 is reasonable for a homemade turbo setup with tuning. once you are making like 300whp...i believe you have to upgrade fuel pump, ignition, and definetly forged internals. the power you are looking to make isnt anywhere near unreasonable with that engine, but it will be hard to make it with $1500, unless you have alot of hookups / fabrication. hope it wokrs out for you.