Nobody loves the NP203 fulltime chaindrive transfer case. It's longer and heavier than the NP205 and has a reputation for stretching chains. We've never had a problem with an NP203 and would have kept it if we didn't need more low-range gearing. So we'll do the next best thing and convert it into an auxiliary low-range box with an Off Road Design Doubler kit. Instead of bolting an NP205 behind the Doubler, we want to run a chaindriven NV271 from a Ford Super Duty. It'll give us more gearing options--thanks to its 2.72:1 low range (NP205s are only 1.96:1) - and we're willing to bet it's as strong, if not stronger, than the legendary NP205.