Well . U arent gonna get much more from that motor.. The heads are the limiting factor. The worst flowing heads GM ever made for a SBC..
My truck is a 1994 TBI 350..
I have absolutely nothing done to my truck except cold air intake and 3:73 gears.. My ext cab truck with gears outruns my friends .030 over 350 in his 92 reg cab truck. Gears really make a huge difference.
U got headers? What intake are u running?
U can get an aftermarket intake that still uses the EGR but its over $250. I would get a good used Edelbrock dual plane carb intake and TBI adapter. Then order a chip to tune out the EGR.
After that, its all going to be in modifying your throttle body. Its the choke..
Go to TBI CHIPS
and go to the TBI mods page. There u will find all the info u need to get a lil more HP out of it with modifying the throttle body
My first choice would be gears..