Drivers Side Rear Spark Plug 440

So I have a dilemma. It appears with the homemade solid mounts (they also look like I need to add spacers to center them) my Demon has, the rearmost drivers side spark plug hits the steering shaft. It broke the plug. Are there shorter bodies plugs? Engine is a 1976 with 452 heads. The car had a 440 in it prior to me, but I didn't see their set up. What are people using?

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