External balance flywheel ID
Here is some interesting info about the '76 - '77 Aspen/Volare.
Talking here the 360 was only available with an automatic trans.
318 was available with 4 spd or automatic.
Guessing your Volare parts car was a 318 4spd car that someone upgraded to a 360 external balance engine and hence the need for the odd external balance flywheel for the convertion.
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