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what is the size of the stock throttle body(mm) on a '98 3.9 vs. a throttle body on a '98 5.2 ?
Mind posting a link to a DIY on how to swap? I only found tips on a 4.7 swap in the stickys.
the 5.2/5.9 is a bigger thortle body and does add top end to the 3.9. you need a throtle body cable for your year truck and a new gaskect. just unblot the tb and bolt up the new one then run the new cable(use the old one to do this) bolt everything up and you are good to go.