Which spark plugs in the 289?

[stump]

The manual calls for an Autolite BF-42, with a .34 gap, for the 289cid. The plugs in there now are Autolite 45, and opened to .40. Does the plug type matter, and why would they have had such an excessive gap?

I bought the same plugs as were in the car before I realized the book called for something else. Is there any reason not to use these plugs? Which gap size?

Thanks,
Gary

 

[monkeystash]

Autolite 45 is correct for the 289. .035 is for points, but if you have electronic ignition, you can run .040-.045. That is what MSD recommends for under 10.5:1 compression.

 

[stump]

Autolite 45 is correct for the 289. .035 is for points, but if you have electronic ignition, you can run .040-.045. That is what MSD recommends for under 10.5:1 compression.

It has points, so .035 it is.

Thanks!