But the 90-93 lower plenum cast is usually constrictive and can use a touch up. When I was porting and polished a lot I used to portmatch them and had customer have some great success with A/F ratios. But HP gains were minimal. If you do it will it's out it's worth, otherwise ain't worth the headache.
On the EGR removal. Search.. that horse has been beaten to death.
San Antonio Zsport Secretary - Would you like cream with your coffee?