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what kind of flow numbers can you get out of these with out any welding or getting to crazy with the grinder

It depends on which port size they are now I had a set SR with standard 440 ports size and no porting that flowed 280 at .600 on a super Flow 600 bench, I sent them to Jeff at MCH for CNC porting to Max Wedge size and they ended up flowing 350 at .600 on the same 600 bench

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)