Don't know much about the powerchokes, but my ole man had an old '86 6.9 E350. had 450,000 on it before the suspension completely fell apart. great truck other than the 4 trannys, and the roller lifter problems he had with it.
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'99 4x4, 6" Skyjacker lift, edge juice, BD 110 inj., MBRP 4" turbo back w/dual stacks, Summit intake, smarty, custom bumper, & '81 Pete 100gal fuel tank.