EGR or not

[F250 Restorer]

I am installing a QJet on an F250 with a 250 hp I6 300.  With the over-size valves, cam, 9.3 cr, etc, and a trick C6, it moves pretty well, and the 3.31 rear gears allow good hauling and cruising, but w/o an OD, I'm looking for ways to improve mpg.

The purpose to the Q.Jet swap, from an eldelbrock 1403, was for mpg, and to retain the hp. 

Should I fab up an egr system to bump mpg, or is the work worth it?  All feedback is appreciated.

[Cliff Ruggles]

EGR added at light throttle cruising via a delayed ported vacuum source, will add some inert matter to the combustion space.  This was started in the early 1970's when engine compression ratios were lowered and the EPA tightened up emission standards considerably.  Keep in mind those engines were GUTLESS and for the most part got very poor fuel economy compared to earlier higher compression versions. 

Adding EGR might help mileage ever so slighty if tuned for it, but in most cases it's not worth the effort.....Cliff