AutoLoc Flame Thrower Kit question

I had the Auto Loc Flame Thower Kit installed in my 69 Ply roadrunner.

Installed two coil's for each exhaust pipe and connected it with the spark plug inside the exhaust like we are suppose too.

We get a flame, But its only like 8 to 12 inches outside the exhausts. What I understand is that the flame should be better than that.

Question: How can we get a longer, better intense flame from the exhaust
(Dual exhausts) We have a 383 eng, with auto trans. Help is very appreciated. Thanks
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