07-10-2015, 10:05 PM | #2 |
Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: 5.7L to 7.4L Swap
The Harness Routing between the two are pretty far off.
A 454 harness out of a similar ('96-'00) truck would be best, Will need minor changes If your still running a 4L60E. Though I would swap in a 4L80E at the same time. |
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1999 silverado, 5.7l vortec, 7.4l vortec |
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