Plugs for ally?

I remember to start gap@ .032" but do I need 43's or 42's? Be running 18 psi to start tuning, but chip is for 22-24 psi and where I will hopefully get to

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I've had good luck with NGK UR5's in my GN, Gapped tight .032 & never had an issue with 30#:D

5's or 6's.. the ac's 43's.. basically any cheap plug one heat range colder than stock. Gap them .030 - .032
 
Autolite 23R's gapped at .32.

Regular 23's never missed a lick for me in over 10 years and these seem to be a little better.
 
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