Originally Posted By 5carguy
About what time frame in 1971 did they change from the wide mouth caliper to the small?
TIA


There is no way of knowing an answer to that question.
Probably the first few weeks of production, would be my thoughts.
Till the supply in inventory from Kelsey Hayes was used up, on the assembly line.
Some pictures of the wide mouth calipers that i sold off from my collection, stash, hoard, of parts.


3505S Carter & 1970 Caliper 016 (Copy).JPG3505S Carter & 1970 Caliper 017 (Copy).JPG
RF-4C Phantom 69-370 Zweibrucken, Germany