I would go with a small plate, injectors, intake, exhaust and a light foot! You should be happy with that......20+ is hard to get with these big trucks.....but a 12V has the best chance to get slightly over 20 than any other Cummins IMHO.......
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Dan MacDonald
www.FASSRide.com
2001 2500, 4x4, Con OFEed, TBK, AFE Stage II kit W/ prefilter and 4" cowl mod. , FASS 150/150, Mach 2's, Drag Comp,
Currently running on B-100
'02 Jetta TDI 5 Speed "Mini Me" 45-50 MPG