no body ever builds a 500 hp 318 cause every body tells them to forget the 318 and build a 360 and if your serous then your stroking that!! last 8 years show me a thread saying a 400 hp 318 was a good plan?? ill wait!!!! if some body ever built a 400+ 318 besides hotrod and chevycraft and shows a dyno sheet other than westech to prove it lil 318 core prices will go up equal to 360 cores!!