Well said by all..... My 470 stroker has a turned down 413 crank,chevy 6.385 rods,custom JE pistons all in a 400 truck block and I`ve been trying to kill it for almost nine years.....NO CHANCE. Very low maintainance, revs quickly to 7000 rpm`s but this is old school and these kits weren`t available when I did mine so I`d get a "kit" today but, they flat out work. Good luck.