I got a 572 kit from them and it was OK but i had it checked and the pistons was OK the rods was OK but the rods had to be honed out for the pins and the crank would run but i had it rebalanced because that"s what BRET said if you don"t won"t TROUBLE and it is running and sounding prefect but any kit i would have got i would have it checked and rebalanced but that"s just me and i would buy from them again so good luck