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Discussion Starter #1
Question #1 - Are these wires recommended "performance wise" for a 65 289 w/elect ignition, warmed over engine (intake/carb/cam/exhaust)?

Question #2 - If adequate, which is correct and do they perform different from one another? (original C code 289)

SB "Radio Resistance" - 12259-1A
SB, solid core, HIPO, SX - 12259-1C
SB, HIPO, SX marked w/radio resistance core - 12259-1C

Thank you!
 

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EarlyMustang,
These are reproductions that pretty much match OE specs. Ford originally designed them for the stock ignition voltage and not much more. Proof? Ford was concerned enough about voltage leakage (spark jump) through the stock wires and stock coil that they required the #7 and #8 cylinder wires be separated! The solid core wire will handle a little more voltage, getting more of it to the plug but it still lacks the insulation necessary to keep a bunch of voltage from leaking out. If your are pushing something stronger than a stock coil I would suggest you opt for a wire set that will handle the increased voltage.
Scott
 

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Sorry, forgot to answer the rest of your question..long day!
The 12259-1A is the stock standard wire, it uses a strand center core wire. This is a radio resistance wire that keeps your radio from buzzing from the ignition. The 12259-1B is a repro of the wires used on the 289 Hipo motor. These used a solid center core wire that allows more voltage to reach the plug, the down side is that without a separate radio resistor the radio will buzz. The 12259-1C is for those that want the Hipo wire look without the radio buzz. It mates the Hipo markings to a stock strand core wire.
The "SX" is the manufacturers code (Essex Wire)
 
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