289 vs 302 how to identify - Ford Muscle Forums : Ford Muscle Cars Tech Forum
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Old 07-04-2002, 06:38 PM   #1 (permalink)
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289 vs 302 how to identify

What is the esaiest way to identify a 289 as opposed to an 302. Looking at what i am told is a 289, but i cant find any casting numbers.

Again, ANY response is appreciated.
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Old 07-04-2002, 07:16 PM   #2 (permalink)
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289 vs 302 how to identify

If the intake is off look in the lifter valley and if it is a 302, "302" will be cast into the block. The casting numbers and date code are found just above the starter on the right hand side of the block....T
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Old 07-05-2002, 02:21 AM   #3 (permalink)
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289 vs 302 how to identify

If (a BIG If)the engine is still original, there should be a small aluminum tag bolted to the intake manifold which gives engine size and date. If the pan is off, look for '1M' on the front counter weight of the crank if it'a 289, or 2M for a 302. If the block casting no. starts out C6 or lower, it's a 289; C7 could be either; C8 and up a 302.
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Old 07-05-2002, 09:24 AM   #4 (permalink)
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289 vs 302 how to identify

You need to remember that after '68, some 289s were built with 302 block castings from the factory. Ford started phasing out the 289 blocks and began using the 302 castings to make 289s. The only true way to know for sure is to check the stroke of the crank or piston travel. The 289 had 2.87" stroke and the 302 had 3.00".
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Old 07-05-2002, 10:47 AM   #5 (permalink)
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289 vs 302 how to identify

Around 67' and 68', it's hard to tell which engine a car would come with. The only real difference between the two engines is 1/8" of stroke. The 289 has a 2-7/8" stroke, the 302 has 3".

As stated, the 289 crank has '1M' stamped on it's counterweight, while 302 cranks are stamped with '2M'.

Casting numbers on earlier blocks are on the very bottom by the starter... and are often covered by grease. (I believe it's that side, could be the other, but I think I'm right) Anyway, they are on that lower rearward section of the block down by the oilpan.

Casting numbers start with a letter indicating the decade the part was produced.
C = 60's
D = 70's
E = 80's
You get the idea......

This is followed by a number indicating the year within that decade the part was produced.

C6xx = 1966
C7xx = 1967
C8xx = 1968
You get the idea.......

The 302 OFFICIALLY came out in 1968, but since the only real difference between the engines is the crank and rods... They even use the same pistons. It's hard to tell which displacement cars made around 67' or 68' ended up with. I've seen 289 blocks with 302 internals, and 302 blocks with 289 internals.

BUT, if it's a C6xx or earlier casting, and hasn't been redone, it is definitely a 289. If it's a 67' or 68', you'll want to double check it. If it's a 69', it should be a 302. The assembly line tends to pull whatever it takes out of storage when stock starts running low... so the unlikely could happen. 70' or later will definitely be a 302.

Good Luck!
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