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I am considering swapping a Big Block 460 into a 2005 mustang that currently has a 4.6. I would like to leave all the electronics as is. I assume using all the stock electronics would allow it to go thru emissions, all they do here is plug into the ODB2 port for emissions testing. Some of the more obvious things I can think of are a crank trigger and coil packs, I'm sure there are lots of others to be addressed but for right now I am just wondering if the stock ECU can be tuned to handle this swap?
 

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try efituning site
 

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I'm running an A9L with a 460 in a 1986 F250. Tweecer RT. The aforementioned EFI tuning site is your best bet for information.
 
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