Spark plugs for Performer heads

I have a B body with Hooker 1 7/8 tubes. Spark plug clearance is very tight on the # 2 cylinder passenger side. Does anyone know of a spark plug that has is shorter than the normal plug? Edlebrock calls for RC12YC plugs.

I use Autolites... but I have TTI's, not Hookers... not sure how much of a difference it is between those two headers.