I use Duraspark II with the small distributor cap on 5357. No issues with spark jumping.
I have also used the big cap distributor on 5357, with no interference problems. I went to the small cap distributor because everybody told me horror stories about how bad it was going to be, but I never saw any problem. Once I got the distributor and wires installed, there was no need to change back to the big cap.
Rocky
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