I just installed some Edelbrock E street aluminum heads and they recommend Champion RC-12YC spark plugs. These are quite long and not a lot of header clearance. Is there a spark plug with a shorter porcelain part that any of you would recommend that will fit these heads? Thanks

Here's a can of worms cross-reference for that plug #. I personally would not run a Champion plug in anything but lawn equipment, but that's just me. I prefer to use OE brand plugs...AC/Delco for GM products. Only other brand I would use is NGK.

Joel Adams
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I use NGK platinum in my 82 CE. I have found Delco plugs to be of questional quality since they have been manufactured overseas.

I think they are made by NGK.

I have NGK V-Power standard spark plugs in my 72, but I have an MSD 6A spark box and distributor.