Can it be fixed- - - -yes. In the truck- - - -NO! For every crack that's visible, there are probably others that are out of sight. You'll need to dismantle the engine, and get the cylinder casting perfectly clean, beadblasted, or some similar type of deep cleaning. Fit the broken pieces back in, grinding a little if necessary for a good fit. V-groove the top of the cracks, and tack-weld the pieces in place to prevent shifting during the repair. Preheat a little, but don't get the parts red hot. Using nickel-alloy welding rod, weld about 1/2" at a time, and peen the weld for several minutes while it cools. This stress-relieves the weld, and prevents cracking beside the weld as the metal shrinks. Weld/peen until the cracks are completely filled. It's a long, tedious process, but if your welding technique is good, the repair will be permanent. A little JB weld applied over the repair will prevent seep leaks, and if you press a piece of 40 grit sandpaper onto the surface of the epoxy after it dries a little, the texture will resemble the cast iron and make the repair almost invisible.
Jerry
