Crank breakers wanted

i broke 2 late 1970's 360 cranks , of course back then i had a heavy foot drove the truck for 3 4 hours at a time at over 100mph brought the truck back to the dealer and they just put in a replacement engine no way to rebuild the old one . after the second engine they told me you're on your own this is the last time we are replacing an engine , at least i was able to drive them to the dealer they made lots of noise but made it there . good old days when they didn't have computers monitoring your driving habits .