Author Topic: 260 or 289?  (Read 1038 times)

Offline Corey Bowcutt

  • Jr. Member
  • **
  • Posts: 91
260 or 289?
« on: September 30, 2023, 03:23:14 PM »
I am slowly figuring out what I have with my project 1964 1/2 convertible.  It is a 260 car built May 12th.  I removed the valve covers to adjust the valves and the heads are marked 289.  Probably a dumb question but would a 260 have come with heads marked 289?  There is absolutely no known history on this car so I am starting from scratch figuring out what I have.

Thank you,

Corey

Offline krelboyne

  • Hero Member
  • *****
  • Posts: 1223
    • West Coast Classic Cougars
Re: 260 or 289?
« Reply #1 on: September 30, 2023, 03:58:28 PM »
Did you find a casting date? Might tell the story.
Scott Behncke - Carcheaologist
West Coast Classic Cougars
503-463-1130
1968 GT/CS 302-4V San Jose 05B
1968 Cougar XR7 Dearborn 09A

Offline jwc66k

  • Hero Member
  • *****
  • Posts: 7344
Re: 260 or 289?
« Reply #2 on: September 30, 2023, 04:23:42 PM »
A better way would be to look at the casting number. It's located on the lower right hand side partially hidden by the starter. A Ford 260 casting part number would be C4OE-6015-B or -E (there are earlier castings that start with a C2OE-, or C3OE-). A 289 casting would be C4OE-6015-C or -F, or C5AE-6015-E (again, there earlier, and later castings).
Jim
« Last Edit: September 30, 2023, 04:30:22 PM by jwc66k »
I promise to be politically correct in all my posts to keep the BBBB from vociferating.

Offline Deuce

  • Sr. Member
  • ****
  • Posts: 282
Re: 260 or 289?
« Reply #3 on: September 30, 2023, 10:21:38 PM »
... would a 260 have come with heads marked 289?  There is absolutely no known history on this car so I am starting from scratch figuring out what I have.

Breaking this into two separate points to consider:

1) From Mannel Mustang & Ford Small Block V8 1962-1969 (Ch.4, p. 4-1): "The 260 V8 heads carried their own unique casting number, but no displacement markings in the rocker arm area.  This made the 260 head easily distinguishable from the 289 head which was marked 289 in this area."  Your car appears to have 289 heads.

2) Next step would be to determine if the block currently in the car is a 260 or 289,  based on block casting numbers and casting dates.  See quotes below.

Did you find a casting date? Might tell the story.

A better way would be to look at the casting number. It's located on the lower right hand side partially hidden by the starter. A Ford 260 casting part number would be C4OE-6015-B or -E (there are earlier castings that start with a C2OE-, or C3OE-). A 289 casting would be C4OE-6015-C or -F, or C5AE-6015-E (again, there earlier, and later castings).

Deuce
1967 C-code Hardtop Coupe, C-4, AC, PS, T/E; SJ built Nov 30 1966, DSO 71___Unrestored
2008 Premium GT Coupe, 5-speed, rear spoiler delete, HID headlamps, well-optioned, built Oct 23 2007, RC 72

Offline Corey Bowcutt

  • Jr. Member
  • **
  • Posts: 91
Re: 260 or 289?
« Reply #4 on: September 30, 2023, 11:41:29 PM »
Thank you all. This is very helpful.

Corey

Offline CharlesTurner

  • Charles Turner
  • Administrator
  • Hero Member
  • *****
  • Posts: 7685
Re: 260 or 289?
« Reply #5 on: October 01, 2023, 01:03:08 AM »
The Bob Mannel book is a great resource to have:  https://fordsmallblock.com/
Charles Turner - MCA/SAAC Judge
Concours Mustang Forum Admin