Howdy Back Pills and All:
Assuming you're doing a quality valve job on the '65 head, I'd recommend, at the very least, a surface plan of .025" to ensure a level mating surface, to maintain your '65 CR and to compensate for gasket thickness differences (See the Sticky at the top of this forum topic), install hard seat inserts, a three angle valve job and back cut the intake valves, new seals.
If you can handle the above and are looking for more, here's a list;
1. Install 1.75" late model intake valves, Your stock intakes are 1.69".
2. Install an exhaust port divider whether you intend to use headers or not.
3. Round the short turn transition from the carb hole to the logs in both directions. Consider boring out the carb hole from stock of 1.5" to 1.75".
4. Polish (in order of most useful) the piston top, combustion chamber, and valve faces.
5. Gasket match and port the exhaust.
6. Pocket port to smooth transition from cast to machined surfaces and trim valve guide bosses. You do not need to enlarge the port walls.
With your 5200 and a good exhaust, you'll love the difference.
Adios, David
I have a 65 fairlane with a 200. Future plans of adding a bottle. For some reason my signature is not showing. Let me once again look at my profile. Thanks for all the responses.
