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.

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.

I use only AC Delco Products, R44TS spark plugs in my 350 / 330 mouse and they perform well with my with iron 2.02 heads.

See if any of these plugs will work for you. I have them in my .040 over small block and had to use the Accel shorty plugs because of the headers. No problem after several years,.

Chevrolet Parts and Accessories at Summit Racing