can anyone help me get an extra 200 hp out of my stock 340 what parts do i need to change or what never can get anyone that i talk to with a straight

here's a 510 hp 371

371ci Mopar Small Block - Popular Hot Rodding Magazine

477hp 340

340 X Head Buildup - Mopar Muscle Magazine

592hp 340

340 Big-Block Engine Buildup - Mopar Muscle Magazine