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Hi, new here and couldnt find what i was looking for... i have an 03 montana van with 3.4 engine that is bad.... i also can get an 02 montana 3.4 engine with good miles and no problems... what needs changed on the 02 engine to work in the 03.... was reading cam and cam sensor are different.... can i just use the 03 cam sensor on the o2 and put the 03 intake etc on the 02... basically just using the 02 long block? or can i pretty much use the 02 as it sits and just change some sensors? please let me know as i need to get this swapped quick... thanks in advance for any help