What spark plugs for a 292 HEI setup? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mahanian · 06-12-2009, 12:24 AM

The PO of my 67 swapped out the distributor for a HEI setup on my 292, but he kept the original plugs. I thought I should upgrade the plugs to the same ones that the mid-70's HEI 292 trucks are running, but the spark plugs aren't similar at all. I did a little research and it turns out that in 70 all of the 292 spark plugs changed to the same ones that the V-8's run. My question is does anyone know if they changed the head on the 292 in 70? I know it changed in 75 to the integral head, but I wasn't aware of any changes before that. The plugs for the 70+ 292 aren't as long so I'm worried that the electrode won't be down in the cylinder chamber.

Anyone have any thoughts on this?

06-12-2009, 12:24 AM	#1
mahanian C10 addict Join Date: Apr 2006 Location: Arizona Posts: 2,432	What spark plugs for a 292 HEI setup? The PO of my 67 swapped out the distributor for a HEI setup on my 292, but he kept the original plugs. I thought I should upgrade the plugs to the same ones that the mid-70's HEI 292 trucks are running, but the spark plugs aren't similar at all. I did a little research and it turns out that in 70 all of the 292 spark plugs changed to the same ones that the V-8's run. My question is does anyone know if they changed the head on the 292 in 70? I know it changed in 75 to the integral head, but I wasn't aware of any changes before that. The plugs for the 70+ 292 aren't as long so I'm worried that the electrode won't be down in the cylinder chamber. Anyone have any thoughts on this? __________________ Jared 67 C10 CST Short Fleet Big Window 65 C10 Custom Short Fleet Big Window 67 Camaro RS



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