If it is a 2 wheel drive it is possible.If the crank has gone bad you need to clean the block to get all the metal out.Plus you might have to check the rods. It would be better to pull the engine.
RepairPal Certified shops can diagnose and repair your 1999 Chevrolet Blazer. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.