Abe’s Answers: Our latest feature!
We frequently get questions from customers. One of our passions here at 45 Restoration is to share information. Abe has a few experts on speed-dial, a slew of reliable online sources and a library of old parts books and catalogs within arms reach so he can research and answer your questions with the most accurate info we can find. We’re going to regularly post customer questions and Abe’s answers so others can find these answers too!
I have a question if you have time. I’ve heard aluminum heads will make a difference on a servi. Is this true? If so, is it because they run cooler being aluminum or are the heads actually machined different than stock? What parts I would need to change a ’65 servi over to high compression aluminum heads?
Thanks again,
Joe
Hello, Joe!
Aluminum heads do run cooler. That does help. Is it noticeable? Not really. If you are running stock one bar iron heads and switch to the high compression aluminum (6:1), you will notice some difference. That’s really where the difference comes from, the compression. You’ll get more with a Mikuni carb, or a sprocket change in my opinion but it doesn’t hurt.
Here’s a list of the parts you’ll need. I added all the options as far as finishes.
Heads: 16682-39
Head Gaskets:
- Asbestos – 16768-39
- Copper – 16769-39
Motor Mount:
- Cad – 16856-40
- Park – 16856-40P
- Chrome – 16856-40C
Motor Mount Spacers:
- Cad – 16860-40
- Park – 16860-40P
- Chrome – 16860-40C
Motor Mount Bolt – (you may have this already):
- Cad – 9780-5
- Park – 9781-5
- Chrome – 9779-5
Washer Set:
- Cad – 16822-39
- Park – 16822-39
- Chrome – 16822-39C
Headbolt Set:
- Cad – 7711-18-45
- Park – 9705-18-45
- Chrome – 8217-18-45
That should be all you would need for the conversion. Let me know if you have any questions or need anything else!
Thank you,
Abe