Listen to crackedback,AJ/FormS and Moper if he has chimed in. I like to over-engineer so commenting from experience I would go against the grain and build a solid 380-400 hp STOCK stroke 360. Stick some Speed-pro flat tops H116CP pistons on stock rods with ARP bolts or Scat I-beams-balance and use a Lunati Voodoo 10200703 cam with stock rockers. I have made close to 430 HP/440 tq (365) with this and J heads (1.94/1.6 231 cfm @ .450") There you go, save your money say no to 4" strokes. J.Rob