Info on options for headers...
-Stock ram manifolds work fine.
-Durango set headers most likely fit with 4x4
-Schumaker makes a set of long tube headers, but the fitment on the passenger side isn't very good and the quality of the headers themselves has been said to be pretty shitty.
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-There are some cheap shorty headers you can get off eBay that fit with a little ding on a tube on the passenger side. I believe the brand name ones are OBX.
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-Pacesetter mid length headers seem to fit. Although I believe they require a bit of hammer action on the passenger side also. Someone with a 4x4 said they had to grind the top of a motor mount bolt for fitment, but it isn't a primary bolt and didn't require any pinging.
-JBA headers I think have the same fitment as the pacesetters.
-It looks like any shorty headers will fit.
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-Having some custom made is also an option, but probably pretty expensive.
-I won't be able to confirm this until my swap is done, but evidently there are a couple more options for the 4x4 trucks due to more space available.
**I'm not a professional motor builder, so I don't know this for fact... But someone said that the benefits of headers only come in at around 5500rpm. So unless you're racing your truck, stock manifolds are just fine and what I plan on keeping in mine.