I wouldnt waste my time with a 4l60. Especially one off MarketPlace "rated" at 600hp. Id rather have a stock 4l80.
Can you weld? If so, you can build a turbo kit for pretty cheap and use the money you saved on a quality turbo.
I like to overbuild from the start, cause then you have a solid platform to upgrade from.
Thats another reason i suggested a Gen 4 engine.
To save a few dollars you can start out with a Gen 4 4.8 since they dont have DOD mess. Just throw it in with a set of LS3 valve springs and build a turbo kit and enjoy.
Can you weld? If so, you can build a turbo kit for pretty cheap and use the money you saved on a quality turbo.
I like to overbuild from the start, cause then you have a solid platform to upgrade from.
Thats another reason i suggested a Gen 4 engine.
To save a few dollars you can start out with a Gen 4 4.8 since they dont have DOD mess. Just throw it in with a set of LS3 valve springs and build a turbo kit and enjoy.