Easiest option is to find a rolling 4x4 chassis, and swap your body onto it.
You will likely be able to run the 454, but you may need to move it forwards a bit as some 4x4s had the engines in the I-6 position, which would cause some clearance issues with the firewall...
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1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)
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