danoreilly
Well-known member
- Joined
- Dec 16, 2010
- Messages
- 138
- Reaction score
- 4
- Location
- Colorado Springs, CO
- My Car
- 71 Mach1 351C 4V
02 Deluxe Convertible
67 Fairlane GT 390
Finishing up the rebuild on my 71 351C. I want to check on something that's been bothering me a bit the last few days, and I can't find an answer in my reference books. My parts interchange book indicates there is only a single part # for both heads on my motor (2v heads). However on the "2" cast into the inboard corners of both heads, there are slightly different symbols next to the "2". Do these indicate orientation or is one was as good as another? Are the heads truly interchangeable side-to-side?