Eljaro Is this block aluminum?? If yes and you have all the pieces, it can be repaired with a good machinist and welder. You would need to add a gridle to the mains for support and drop the rpms in range to 6,000. Block would need to be welded and tubed for the
oil side. Camshaft bearing area would need to be welded and recut. Crankshaft is done. Need to check rods and pistons. Bores for being still square. Front 2 cylinders get sleeves. This block has seen the end of race days. What fluid dampener are you running? I don't see any spacer on the nose of the crankshaft. Some fluid dampeners need to be allowed to warm up before driving. I have this problem with my ATI. The weiht doesn't move in the thick silicone at the start and the motor has the shakes. By the time the
oil pressure drops to 75 psi the vibration is gone. If you have silly money to spend on a custom dampener, One company will send a guy out to do a vibration test and custom the weights and fluid to best match and reduce vibrations at a certain rpm range. Sorry for the breakage. Will look at the other pictures. Rick L.