Just curious, what's your oil pressure. I would suspect U-joints also. Mine is 160.5" wheelbase with 3 piece drive shaft and two midship bearings - lots of chance for noise in this set-up.
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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