440 build question

You only want 400HP? Just find a 440 that needs rebuild. Still running and no knocking or damage.Tear it completly down and take everything to a good automotive mach shop.If cyl walls ck out good and still within spec you can get away with just having them honed.That way you can re use your pistons.Have the mach shop ck out and recondition block,rods,pistons crank,heads etc.Have them install bushings in the rods for floating wrist pins.Have them deck the block about .035 to raise compression (free horsepower) Then re-assemble with a mild hyd performance cam, good intake,650 or 750 holley carb,headers,and good ignition.That should get your 400HP.