I'm not worried so much about the gear backlash as I am the slop in the timing chain.
The backlash between the gears is probably not going to be any concern at all. Besides every distributor fired ignition system ever made has the same thing.
But I'm not really worried too much about that. It's just an OLD engine that I'm going to play with.
If this works I might Do the same thing to my 1987 Wrangler that has a 2.5L 4 banger in it.
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