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Rmay,
I agree on the diesel motor, one of the nice things about the 90s suburban’s is a 6.5L diesel was a stock option (no diesel swap title issues). Right now I am leaning towards a new (AMG/GEP) 6.5L or an Isuzu 4BD1T backed up by a NV4500. The 6.5 is the easier “bolt in” swap, the Isuzu would be harder but it has been done and documented before. Because of the vehicle’s intended use 4x4 is necessary, but I hope to offset the added weight of the 4x4 system with weight savings elsewhere and I will swap the lower gears typically in the diesel 4x4s out (4.10->3.42). I think weight and gearing are 95+% of the penalty of the 4x4 over the 2wd when it isn’t engaged.
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