[MikeK]

Originally Posted by Benson

Mike,
I guess maybe the strange plug location on the Lion head might be related to my rough idle problem from what you said in your post?

As an experiment I might replace the Lion head with a head "with the large B on it" or a Snyder 6.0.

Thanks

Before you yank that Lion head for the reason you state try an extended tip, reduced center diameter(fine wire) platinum plug, like the Autolite XP series @ 0.040 gap. About $7 each. The plug tip design greatly affects kernel propagation. Make sure your dizzy rotor gap is even at about 0.025 all around and check the evenness of the spark with a scope. Some coil/condenser pairings are unstable too, you might also want to check that. I assume you have no intake cracks or vacuum leaks. Cams with sluggish ramp-ups (big difference between zero lash and 0.050 duration) idle rough, too.

Yapp Lion Head: