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Ok good deal thank youYou would need to use a 4406 transfer case, a manual shift would be best
Your '99 should have the 1354 which won't fit the R2, I think Advanced Auto used to make an adapter but most people wanted the heavier duty 4406 with a V8.
You do need an R2 from a 4x4 so it will have correct tail shaft for transfer case, or better yet get trans and transfer case from same vehicle, '97-'03 F-150 with 4.2l V6 will fit 5.0l(302) bolt pattern, and has the shifter located farther back so close to R1 location now