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Does look strange... But looks like a hole for a distributor.
There's also place to mount a thermostat, they both are unused. The distributor gets blocked off. No coolant runs through the thermostat opening since there is no coolant passage in the head.
LT1` on the left TPI on the right
Last edited by A95Y; 10-12-2015 at 11:34 PM.
Reason: picture