i know that the top end is interchangable on the 3400 to a 3.1. but i was wondering if the fuel rail and fuel system is also interchangable, and anything else that is interchangable i would like to know about??thanx
the fuel rails are not interchangable, if your using 3.1l top and you need 3.1l rails, 3x00 needs 3x00 rails. pretty much all the top end is different between the 3.1 and 3x00.
http://www.domesticcrew.com/installguide.htm#1
this is the link to the 3400 swap guide. for a top end swap, you need to do everything except the front motor mount bracket.
