white_lightning
forum member
I do all of my own work on my 2007 and putting in a GT500 5.4 is the best way to go. I recently swapped back to a 4.6 3V based engine and instantly regretted it (huge hp and torque loss). If you want to run great numbers and beat up on Challengers and Camaros, the 5.4 is a much better starting point (way better heads, more cubes, no VCT bs, rocker arms don't pop off with big cams, many tuners and parts available, etc).
Aluminum block vs iron is a cost vs purpose issue. Both 5.4 blocks are good for whatever you throw at them at street hp levels. My 2007 chassis was a V6, but it doesn't matter (engine swaps are plug and play). For your 2007, you swap the PCM computer, the engine harness and battery-to alternator wire from a 2007 thru 2009 GT500, that's all the wiring. Your gauges and everything work (get an aftermarket boost gauge- no need to get the whole dash swap just to have a GT500 boost gauge). Get your keys entered into PATS (5 minutes at dealer or a locksmith).
Thank you for this reply, knowing which harnesses I need is super helpful when looking at these packages. I was looking at a "master kit" but it seems it would give me lots of redundant parts.
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