Gap Spec on 75 Grandville 455

Dan75

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Good morning everyone,
I seem to have a case of CRS and the wife relocated my 75 repair manual. Nonetheless, what is the spark plug gap for a 75 Grandville 455. I seem to recall .040, but also seem to remember some hub bub about .060, the latter being to wide and issues with the engine flooding out where GM backed down the gapping to .040 again. Any help is appreciated in jogging my memory….
 

melsg5

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All sites for 75 show .060. Later years are more varied, some .040 some .045. Personally I would do .050 or .045.
 
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