Ran across this while I was looking for stuff on the 841, seems that Sam Pierce used an 841 frame in this prototype. The list of modifications to the original Chief engine is impressive...
P-61 American Rocket
P-61 American Rocket
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1964 FLH
1972 R75/5
1996 XL1200C
2001 R1200C
2007 FXSTB
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