Feeling foolish, my search terms perhaps kept me from finding these. I had no idea this was a "thing". I appreciate the replies. My pump came with the mandrel, wishing I had known a bit more when I purchased it and I could have asked more questions.
Thanks!
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1968 Firebird
IAIIa 522
340 E-heads
Northwind with XFlow TBI
4L80E
3.50:1 Rear
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