Pistons are out the block. and yea i know gasloine is flammable thats why im doing this outside
Thanks for all the responses i ended up soaking the pistons in half a gallon of Gasoline mixed with 1 can berrymans fuel injector cleaner. Total cost 5.99 for the berryman fuel cleaner and 2.50 for the half a gallon. Used a wire brush let it sit for an hour. came out pretty good!