If it were me, I would pull it completely down and inspect everything!
It only costs time and the price of a gasket set.
I bought an engine that looked great and had been rebuilt recently. Thought I was good to go. Pulled a piston and rod to be sure and the rings were broken in that cylinder...and the next...and the next...
Would have been a PITA had I installed it as-is. Apparently someone didn't know how to install pistons with a ring compressor.
'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.
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