correct spark plug

[resto75]

I have a quick question on the right spark plug for my 75 which has double hump heads. The head number is 378461 and I believe they came off a 1965 model.

Thanks Roy

 

[JohnZ]

If they're #3782461 (not 378461), they were used on '61 283's and '62-'66 327's, and have no tapped holes in the ends for accessory drive mountings. I've found that AC R45S plugs work great with these heads for normal driving - R44's (one heat range colder) tend to foul occasionally for in-town driving.

 

[resto75]

Thanks John,

3782461 is correct,,so much for my typing skills

 

[67435animal]

Agree with R45S. Used them in my 67 300HP convertible with great service.

Bob