Block ID question
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Block ID question
First off I have read the 'Read First' pertaining to block casting numbers.
My questions is how do I know if my block is a 302 or a 289 and do I care?
Block numbers are C8OE-6015-A
I am just trying to figure out what I have in my truck (1970 F100), the vin 'A' suggest a inline 6, the cali engine replacement plate suggest a 1970 302 and the block says 68-- both 289 & 302 made that year.... The original owner said it had the 'original 289 in it, so I know he was lying already, unless the 1970 302 cali replacement tag was when they installed the 68 block (is this possible?)..
And the 2v carb that is on it D2TF if a 1972 2100... BTW, I am replacing with a Holley 4160 next week...
thank for any help.
My questions is how do I know if my block is a 302 or a 289 and do I care?
Block numbers are C8OE-6015-A
I am just trying to figure out what I have in my truck (1970 F100), the vin 'A' suggest a inline 6, the cali engine replacement plate suggest a 1970 302 and the block says 68-- both 289 & 302 made that year.... The original owner said it had the 'original 289 in it, so I know he was lying already, unless the 1970 302 cali replacement tag was when they installed the 68 block (is this possible?)..
And the 2v carb that is on it D2TF if a 1972 2100... BTW, I am replacing with a Holley 4160 next week...
thank for any help.
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That casting # is the 302 block with the longer skirts according to my info. It's possible that they could have used 289 parts in it but since you have 70 302 tag, I'd say that the odds are it's a 302. How many bolts on the balancer and can you get a # off it?
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What do you mean 'Skirts', is this different than other 302 blocks?
When you talk about bolts on the 'balance' do you mean the one bolted to the front of the crank? (harmonic balance / vibration dampener?).. Sorry for the questions, I just want to get you the correct information in efforts to get good info back..
Thanks again..
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Sorry I should have been a little more specific in my language. As Conanski pointed out, the 302 has a longer stroke than the 289 (the distance the piston travels up and down the bore). To keep the piston from rocking in the bottom of the bore, the cylinder was lengthened. The cylinder skirt is the part that sticks out of the block at the bottom, so with a longer cylinder, you get a longer skirt, if nothing else is changed, which in this case wasn't. Yes I am talking about the Harmonic Balancer or Damper that is bolted to front of the engine. The number of bolts is how many it takes to hold the pulley on, not counting the big bolt that holds the balancer on.
It will either have 3 or 4 holding the pulley.
Edit: Just noticed a question I missed- It is not different than the other 302 blocks, it is the first 302 block. The earlier castings were 289 blocks and the main differebce between the 2 was the longer skirts.
It will either have 3 or 4 holding the pulley.
Edit: Just noticed a question I missed- It is not different than the other 302 blocks, it is the first 302 block. The earlier castings were 289 blocks and the main differebce between the 2 was the longer skirts.
Last edited by doug1222556; Sep 13, 2009 at 08:32 AM. Reason: missed question
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Sorry I should have been a little more specific in my language. As Conanski pointed out, the 302 has a longer stroke than the 289 (the distance the piston travels up and down the bore). To keep the piston from rocking in the bottom of the bore, the cylinder was lengthened. The cylinder skirt is the part that sticks out of the block at the bottom, so with a longer cylinder, you get a longer skirt, if nothing else is changed, which in this case wasn't. Yes I am talking about the Harmonic Balancer or Damper that is bolted to front of the engine. The number of bolts is how many it takes to hold the pulley on, not counting the big bolt that holds the balancer on.
It will either have 3 or 4 holding the pulley.
Edit: Just noticed a question I missed- It is not different than the other 302 blocks, it is the first 302 block. The earlier castings were 289 blocks and the main differebce between the 2 was the longer skirts.
It will either have 3 or 4 holding the pulley.
Edit: Just noticed a question I missed- It is not different than the other 302 blocks, it is the first 302 block. The earlier castings were 289 blocks and the main differebce between the 2 was the longer skirts.
Thank you for the clarification and everything was as I thought, just did not want to provide incorrect information.
The balancer has three (3) bolts threaded into it to hold the pulley on. Now what does three (3) mean vs. four (4)?
Thank you very much for the help
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If my information is correct, the 289 and 302 balancers do not interchange. Ford went to a 4 bolt right around '70 and as far as I know, none of the 289's were 4 bolt. Had your balancer been 4 bolt, I would be fairly certain it was a 302. Since it is 3, it could be either and you would have to find a casting # on it which is probably not easy with it installed.
The balancers were also different thicknesses, but again , my info includes the snout which would be hard to measure installed. The balancers were also a bit larger in diameter, but even that would be hard unless you had some large calipers.
Hey- it was a shot.
The balancers were also different thicknesses, but again , my info includes the snout which would be hard to measure installed. The balancers were also a bit larger in diameter, but even that would be hard unless you had some large calipers.
Hey- it was a shot.
Last edited by doug1222556; Sep 13, 2009 at 10:29 AM. Reason: spelling
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If my information is correct, the 289 and 302 balancers do not interchange. Ford went to a 4 bolt right around '70 and as far as I know, none of the 289's were 4 bolt. Had your balancer been 4 bolt, I would be fairly certain it was a 302. Since it is 3, it could be either and you would have to find a casting # on it which is probably not easy with it installed.
The balancers were also different thicknesses, but again , my info includes the snout which would be hard to measure installed. The balancers were also a bit larger in diameter, but even that would be hard unless you had some large calipers.
Hey- it was a shot.
The balancers were also different thicknesses, but again , my info includes the snout which would be hard to measure installed. The balancers were also a bit larger in diameter, but even that would be hard unless you had some large calipers.
Hey- it was a shot.
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Thanks for the shot.. In reality it does not make much of a difference, in 68 the 302 and 289 both produced the about the same HP and Torque. when I rebuild it (hopefully a few years from now) I will find out for sure. 99% of the parts are the same so at the auto parts store it's no big deal, just the rebuild parts will be different.. perhaps I will continue my looking for a 351w to rebuild..
But you are right, for the time being, it really doesn't matter whether it's a 302 or 289.
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Just one thing- Just because your block decodes to a 1968, doesn't mean it or anything else on your motor are as old as '68. It is only the date that particular casting mold was put into production, and your motor could be a few years newer, (originally) and your components could be any age. Given you have a 3 bolt balancer it points to @70, but your carb is a 72, no way it was put on in 68.
But you are right, for the time being, it really doesn't matter whether it's a 302 or 289.
But you are right, for the time being, it really doesn't matter whether it's a 302 or 289.
The carb had been changed out, I talked with the previous owner yesterday and as I thought he had changed the carb from a 72' F250 parts truck he had. that goes along with my 3rd member too as the yoke is a 72' F250..
I will find out for sure when I go to rebuild and I hope it is later rather than sooner..
Thanks again
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