Hi everyone, i have a question that hopefully someone can help me answer. 2 years ago i bought a 1964 1/2 mustang with what i believed was a 260ci,(Fenders say 260, tag on intake manifold says 260, but a few days ago i replaced my valve cover gaskets and on my heads its stamped 289 99. So im beginning to wonder what engine i really have. Will heads from a 289 fit on a 260? I know for sure that it has the 5 bolt bell housing. it has a 2bbl intake and 2bbl carb.

Thanks in advance for any help.

 

Can you locate the casting code above the starter ont the right hand side of the block?

 

what ez said.

i don't remember if my 5 bolt d code 289 has the intake tag or not.

happen to have a pic of the intake tag?

 

Do i need to pull the starter

 

Exactly.
magic number is hidden above starter.

 

all right ill do that tomorrow. lol

 

Ok i pulled the starter this morning and i got the numbers!
4C25
C40E-6015B

this site says its a 289
http://www.mustangtek.com/block/Block.html

 

Was gonna say congrats!

But I guess you were hoping for a 260?

Still... you have a beautiful 5 bolt 289...I like em.

You picked up a few ponys.

 

Do you know what engine your car originally came with? What is the 5th digit in the vin number?

 

yes it came with a 260. But im still not 100% sure if its a 260 or an early 289.

This site says its a 260 or a 289, a bit confusing.
http://thecareandfeedingofponies.blo...ification.html