3.1 2.8 3.4 chevy fwd

Im new to this forum thing. I own a 91 beretta which I couldnt find many products for, and I know some of you out there looking might be interested that I found about the only way to get some major horsepower is at engine-parts.com. I am buying a stroker engine to convert my 3.1 into a 3.4. If someone knows where to buy some headers help me out. Maybe someone knows what cars to look on in salvage that had factory headers.