Search man all those questions have been answered many times. I ran my exhaust throught the hood at 1 point plain shorty ls1 headers go right through the hood vents. Most guys are running a 3 core aluminum radiator stock replacement works fine. Electric fans range from Taurus fans to cheap autozone fans. Fuel system a Walbro 255 pump with a 99 corvette fuel filter will cover your fuel system. The filter has a built in regulator and return line. Just don't go cheap buy a wix filter.