Post five has me, most concerned.
Drilling and tapping 557 blocks for 4 bolt mains is a huge NO-NO on a 557 block.
I would NOT want to run that engine, AT ALL...
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1977 Black Trans Am 180 HP Auto, essentially base model T/A.
I'm the original owner, purchased May 7, 1977.
Shut it off
Shut it off
Buddy, I just shut your Prius down... 
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