Junebug, you mean ETH since you have a 2001 6-speed. I would just add a boost elbow or what some people do it plug the line going to the wastegate.
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2001 2500HD Quad Cab SLT SB 4x4, HO Cummins, 6-speed, 3. 55 gears, LSD, brightwhite/driftwood, air dam, 4w ABS, camper and trailer tow packages, fog lamps, CD/cassette, HD transfer case, snow plow prep, travel convenience group, cab lights, Isspro Boost and Pyrometer gauges mounted on A-pillar, PowerEdge, 4" JRE exhaust, BD exhaust brake. 12500 miles as of 7/26/00.
1980 CJ-5, Modified for off-road use, bobbed fenders, 350 TBI, NP435 trans, 4. 56 gears, Dana 300, Dana 44 front, Dana 60 reverse-cut rear axle, ARB air lockers front and rear, 15/35/15 Super Swamper TSL on 10X15 steel rims, Cobra CB, Warn 9000I winch, nerf bars, 1/4" steel rock crawler bumper front and rear, jerri can/spare tire rack, custom roll cage.