Hey guys, im new to the board and new to the lt-1 engine. I am fixing to drop a lt-1 in a 95 yukon on 38s for more power. I am thinking about doing the ported manifold and 58mm throttle body, what kind of gaines will I see?

 

If the engine is relatively stock, somewhere between 0 and a small loss. You will only see a gain on a setup with a healthy heads/cam.

One example