Plan on rebuilding my 350 4 bolt main within the next year or so. I want to start buying parts, as money permits. I already know I want to build a 383. Where can I get a good deal on a 400 crank, pistons..etc. Also, are forged pistons better than cast? Plan to put on the edelbrock performer intake manifold and cam. Not sure on what type of headers are best. Any ideas? Should I use an electric fuel pump? I heard it may free up a few ponies. Already plan on buying an electric fan. Suppose to help out on MPG as well as freeing up another couple of ponies. How about MSD ignition? Is it worth it? Any other performance add-on that will beef up my engine? Engine will be going in my 77 1/2 ton 4x4 Silverado.