It has six EGT bosses that were added, and I'll be moving the probes around, you can bet that. I know I'm keeping it!

R
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I am fairly new at this but I don't think the "bosses" you mentioned were meant for EGT(I assume EGT=Exhaust Gas Temp used in todays ECU setups). They were Air injection ports to aid in the engine passing the smog regulations "back in the day." The orginal exhaust manifold had them as well and the air pump was mounted on the opposite side of the block from the alternator. I have a working air pump if you would like one :P .

Good luck on the new motor. I have located several parts cars around North Alabama if you get into a bind and need another block.
Paul