Spark Plugs for my 230 engine

[Kwt-B4]

Hello everyone, i need some help.

spark plug installed in my engine AC Delco R45 gapped at the spec of 0.040", should i go and replace it with same brand and gap spec?

Thanks in advance.

[Doc Dave]

.035 is what I have always used

[Kwt-B4]

Thank you Sir.