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Old 06-14-2004, 15:40   #1 (permalink)
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Quick way to tell difference between 302 and 351 cleveland

Does anyone know a quick way to tell the difference between a 302 cleveland and a 351 cleveland. Its out a 72 Fairlane, the Vin code is Q, which from my research shows it should be a 302, bearing in mind our codes here are totally different to any other countrie's codes. A 'C' would be a 351, the rocker covers are orange, the carb is a double barrel single deep throat stromburg, I think its a stromburg, looks like the one on our 302 windsor.
The only number I could find on the block was D2AE-CA, I have tried to check it out in all my V8 books, but they don't really cover a 302C.
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Old 06-14-2004, 17:36   #2 (permalink)
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Re: Quick way to tell difference between 302 and 351 cleveland

Pull a plug and put the dipstick in the bore with the piston on TDC. Mark the dipstick.Turn the engine over by hand. If 3 inches? It's 302 if 3.5 inches? It's a 351.

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Old 06-14-2004, 18:07   #3 (permalink)
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Re: Quick way to tell difference between 302 and 351 cleveland

Quote:
Originally Posted by brenx
Pull a plug and put the dipstick in the bore with the piston on TDC. Mark the dipstick.Turn the engine over by hand. If 3 inches? It's 302 if 3.5 inches? It's a 351.

Brenden
This is a good tip! Never heard it before but so simple.
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Old 06-14-2004, 18:45   #4 (permalink)
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Re: Quick way to tell difference between 302 and 351 cleveland

Dayle - get Stephen to do it - note the "turn the engine over by hand" don't let him use the starter - don't want you to have your good hand screwed up as well
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Old 06-14-2004, 21:22   #5 (permalink)
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Re: Quick way to tell difference between 302 and 351 cleveland

thats called measuring the stroke. hence the names 302 (3in) and 351 (3.5in)
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Old 06-15-2004, 05:15   #6 (permalink)
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Re: Quick way to tell difference between 302 and 351 cleveland

Quote:
Originally Posted by GS-0351girl
thats called measuring the stroke. hence the names 302 (3in) and 351 (3.5in)



donít get confused by the coincidence here for example a 460 has a 3.85 inch stroke and not 4.6 inch, regardless though measuring with a dipstick is a sure way to get it.


The D2AE casting number means it was a block cast in 1972 intended for use in cars, I can explain how these casting numbers work if anyone is interested.
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Old 06-15-2004, 05:22   #7 (permalink)
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Re: Quick way to tell difference between 302 and 351 cleveland

302 = 302 cubic inches capcity, 351 = 351 cubic inches displacement ..nothing more, nothing less.

Tyre Toaster, post it up. I have it in a book somewhere but I am sure everyone would be interested.
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Old 06-16-2004, 02:39   #8 (permalink)
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Re: Quick way to tell difference between 302 and 351 cleveland

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Originally Posted by TyreToaster
donít get confused by the coincidence here for example a 460 has a 3.85 inch stroke and not 4.6 inch, regardless though measuring with a dipstick is a sure way to get it.

If you have a 4 inch bore (or 4.030) it is a good rule of thumb.
3" stroke = 302
3.5" stroke = 351
3.75 stroke = 378
3.8 stroke = 383
4.0 stroke = 400
Its all good anyway........
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Old 06-17-2004, 02:30   #9 (permalink)
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Re: Quick way to tell difference between 302 and 351 cleveland

i dont have a listing as such but i will compile a list and post it soon
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Old 06-17-2004, 15:47   #10 (permalink)
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Re: Quick way to tell difference between 302 and 351 cleveland

Thank TyreToaster. And thanks to all for replies. Don't worry Leon, its a given that Stephen would have to do that cranking bit, and I think I will pop a straw in to check for TDC and length, my history of sharp metal objects and piston walls is not good, bit like my history with bent push rods. Had to order new valves as well as push rods for that little story now, dam engine is costing a fortune, told S it would have been cheaper to buy me a rev counter years ago. :D
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