[289 fia]

AS CSX4815, I'm also running 42# injectors with a TWM system on a Keith Craft 351 (408) with 584 hp at the crank. The brand is Walker with a part # 500-1018 o6C5 on the sealed bag. The injector has D1680BA stamped on it.
You should be able to cross reference these numbers from a supplier. Hope this helps.
Allen Nicholas
Prunedale, CA
KMP517