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Having the motor rebuilt
951mat Looking at the flywheel it was possibly 0 balanced. Crank looks the same way. With the damage to the crank, you should have the motor gone through completely and rebuilt. The crank may need just a polish of the journal and would replace that rod. This would be the cheap way with polish and rod. The better way is have the crank done, all the rods checked, balance the bottom end with flywheel and balancer all as one unit. Have the heads both checked out. Any idea why the spring broke? bang the motor off a limiter? spun bearing is a possible oiling problem or clearance got to large for that rod bearing or the bolts stretched. Are there ARP bolts on the rods? Doing a short block rebuild may be cheaper in the long run. If you are going to keep racing, have the motor oiling system blueprinted, and add a Melling HVHP pump with harden shaft. Rick L.
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