Hey guys I've got a 2001 chevy silverado with a 4.3L vortec that im daily driving, and an old 97 k1500 z71 with a 5.7 vortec. I was wondering if anybody has done this swap before and can give me tips on how to do it. Like whether i have to swap the ECU and wiring out of the 97 into my 2001. Any help would be appreciated guys. And as always keep on truckin'

 

im not sure what youd have to do, but why would you want to go from good mpg to ****ty mpg? .....

 

Wouldn't go to a 5.7...why not swap to a 5.3 or a 6.0? More power than the 5.7 and better mpg