I'm trying to figure out what is the correct oil breather cap for my car. It's is a 1970 Mach 1, 351W-2v. Built at Dearborn on 09/24/69. Marti report says nothing about emissions. I've seen several types on the different parts vendors below. Thanks for the help everyone.
Very early car you have there
Looked through my picture and it appears that your #2 is the correct one for your application #3 was used on the 351 2V Cleveland applications
Hope this helps
Both examples are fairly early 70 H code Dearborn cars ( 0F10251x xxx & 0F11188x)