We can guess all day long whats been done to this engine since he gave no infomations so that's why I said "If your heads are stock then I would run the stock plugs. If the engine is running good with the plugs currently in it staying with the same type of plugs is the way to go; why create a possible problem changing heat ranges if that's not an issue. We don't know if the engine is tired, or for that fact modified and he doen't say why he's thinking of a plug change. To me it sounds more like he wants to know the gap he should be using, not that anything is wrong currently with his motor.
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Originally Posted by Hank70SS
R43XLS is the stock replacement plug. He should read his current plugs though just to see if he needs a hotter or cooler plug. That's why I asked what he was running now so he could see if the 43 is right for his engine. I'm sure that engine has had some work over the decades.
Also as for the wires. I'm running Accel wires, they're black with a yellow Accel logo in them. Red/orange boots that can be angled enough to clear headers, at least they clear my headers. I know guys that spend a fortune on plug wires or make custom fit ones. The Accels, even the stock Delco's from a early 80's 454 pickup will work good.
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Robert. A cool wife who understands is a wonderful thing! 67 Elky Global West suspension kit with coil over QA1's,435hp Edy Crate,700R4, Currie +9 3:75, Disc brakes front and rear, Dakota Digital gauge package, 12 circuit Painless wiring kit, Ididit tilt Colum, etc.
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