You mean, mechanical EGR?
150 is EASY, go with the .375s with a pop test and tune 2, pd150 intake, A tune, vtn 17 turbo or k03/k04 hybrid, and a DIY water Meth injection. You can make one for about 150
Get a set of auber gauges for EGT, Oil PSI, and Boost and then get a tune from Malone
You can make the vtn17 work easily. its just a turbo. it works off a vacuum but you can easily get a boost to vacuum converter and make it work. Get a tune that deletes your n75 if you do have one. Do an EGR delete as well.
you should be at 170hp with this set up and with the shot of water meth you would get a boost up into the 180-190 HP depending on the amount you inject.
Building one is easy, you just need the right parts. If you want i can share into that about how i built mine. Its ran off a relay off the boost and EGT. If the boost is past 13psi and the EGT's are past 1300 the pump and solenoid activates and injects a heathy dose of cooling power. The nice part of the Auber gauge is you can set the relay on and off parameters, Injects if boost gets to 13psi or higher and off when it drops below 900 and On at boost at 13psi and off at 10psi Its also on a switch so i can turn it off. If you run water meth you could run a set of PP.764 and get way more power but your going to need to upgrade your clutch at that level. Either way you can always up a few parts and get more power with the turbo i recommended. If you want to go big, go another route.
I highly suggest you get a upgraded exhaust manifold, this will help BIG time with EGT's. If you have some handy skills with power tools, you can do a port and polish on your head for about $100 in parts. Delete your EGR, PD150, Port and polish your head and gasket match the exhaust and intake ports to the gasket or larger. This will be a BIG help with EGT's and will help with power delivery. Its not hard work, its just a bunch of easy long and repetitive steps.