It does appear that the seals were brittle, certainly age can play a big part in that. Do you think the engine was running too hot or the possibility of some aggressive chemicals were introduced in the oil? just thinking outside the box a little.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
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