You won't find too many common parts between those motors. Small gains can be squeezed from the 2.5, frankly if your committed to the 3.4 swap why not just drive the snot out of it now and get used to the handling and stash the cash for a quicker swap? My lowly 2.5 sweeps past 100 without complaint, sometimes I wonder when is fast fast enough but I have to admit I like the speed as well.
Last edited by xusmnimij; 12-16-2007 at 02:31 PM.
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