<VV> Autolite 275 spark plugs ?

[Charles Lee]

Are Autolite 275 spark plugs correct for a 1967 110 PG ?

The car is  overheating, and all else seems to OK, and this is just one link
in the chain...

I'm not asking if there's a better plug, although if these are wrong, then
maybe that will help, but I just want to know if this will cause the problem
?

I think these were bought back 10 years ago, and they have very few miles on
them, and are clean enough, but may be wrong heat range or something ?

Thanks
Charlie