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Old Mar 30, 2003 | 08:37 PM
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Kai
Rotorphile.
 
Joined: Mar 2002
Posts: 10,120
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From: Richmond, VA
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1) The A1 head is not weaker. It is the same PR4 casting as is used throughout the entire B18A/B and B20B/Z production run.

2) Yes, it will work just fine. The blocks are virtually identical.:thumbup:
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