I have a stock 2007 Sierra with a single 72/76 turbo. Also has 4L80 trans and yank 3200 convertor. Runs really good. Made 540 rwhp. I want more like 700 rwhp.

This is my daily driver and i tow with it.

I'm going to build a new motor. My goal is to use the stock crank, good rods (your recommendation please) and a mild cam. I want to keep the stock intake and turbo kit but am open to a bigger turbo, nothing more than a 76-80 though.

What do you think of using the stock crank?
Have you considered the ProComp Motorsport LS1 heads? Really good price and seems like a solid performer for the price, plus i like the smaller port volume.

What cam are you using? I want a very mild idle and EXCELLENT everyday driveability.

Any advice you can give me would be appreciated.

Thanks -

Roger