I did. My suggestion was to start another thread rather than to ask about steering in a thread titled LT1 swap thats actually about a Vortec. Just trying to get you to a more appropriate audience.
On your Vortec build, we've been over much of that. Its a truck engine. It was designed for torque over horsepower. They run fine and roast tires at will when swapped in lighter vehicles. The fuel system just isn't ideal for upgrades. There are no jets to upgrade. The injectors are part of a spider assembly and aren't replaceble. Have the guys you work with pull one off the shelf so you can see what I'm talking about. In stock form the Vortec doesn't tolerate much in the way of cam upgrades either. Also the valve springs won't take much lift so big cams or 1.6 rockers need extra head prep. You'll end up having the ECM reprogrammed as well. All of this costs time and money. As far as it being any different to rebuild, it isn't. You can absolutely build a Vortec longblock to 350-400hp. Its been documented all over the internet. You just aren't going to do it with a stock Vortec fuel system, stock cam and heads, or a $1500 budget.
For the reasons listed above, I believe that an aftermarket fuel system will get you to your goal cheaper and easier than trying to do it with the factory fuel system.