My buddy has a 1978 351M that he is looking to change over from the old v-belt to a sepentine belt. I imagine the harmonic balancer would be the hardest thing to find? Anyone done this or know what parts it would take to make this work?
march makes a complete kit to do that. the balancer would be the same cuz the pulley just bolts on with four bolts(iirc). if there isnt a listing for a 351m get one for a 351c there the same. check jegs or summit.