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Unread 01-19-2009   #1 (permalink)
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Default Difference Between 302 and 351

Whats the difference between the 302 and 351 blocks? I am building a 302 and a guy has a 351 5 speed car for cheap! I am lookin to bolt a 5 speed behind my 302! Will the 351 bolt pattern be the same as the 302 and is there any other mods I may have to do to make this work? Thanks Keith
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Unread 01-19-2009   #2 (permalink)
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The difference is the height of the deck. You measure from the crankshaft centerline to the height of the deck, a 302 is 8.200 inches, and the 351 Cleveland is 9.200 inches, and the 351 Windsor is 9.500 inches. Other than that, the blocks are the same. Same bore, same construction, just the higher deck height.
As for the bellhousing, the bolt pattern should be the same as well.
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Unread 01-19-2009   #3 (permalink)
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Eaglemotorsports is correct and the bellhousings is the same. I would buy the 351 if it is a solid engine and tranny and just have a spare engine. The 302 and 351W even uses the same headers but the 351C's are different both the 2V and the 4V but the 302 BOSS and the 351 4V are the same. Hope that helps.
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Unread 01-19-2009   #4 (permalink)
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Thanks for your help guys! Its a 1970's rebuilt 351 carb motor with a 5 speed, 4.10's in a 88 gt conv. car! Body is straight, 4" cowl hood and weld drag lites all the way around, borla exhaust! Running, decent int., mostly drag car for $1,000.00. Not too bad of a deal I do believe!
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Unread 01-19-2009   #5 (permalink)
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Sounds like a smokin' deal.
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Unread 01-19-2009   #6 (permalink)
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Quote:
Originally Posted by 1BDTOY View Post
Whats the difference between the 302 and 351 blocks?
Deck height, main and rod bearing sizes, overall strength.

A 351W for example has bigger mains and is much stouter than a normal production 302 block. Almost everything else external, with the exception of distributor, intake maniforld, and damper will bolt up. You do have to watch the external balance! Cams are the same (watch firing order).

For a cheap hotrod, the 351W is a great choice. The head bolts are bigger, the bottom end stronger, the rods are longer.

Quote:
I am building a 302 and a guy has a 351 5 speed car for cheap! I am lookin to bolt a 5 speed behind my 302! Will the 351 bolt pattern be the same as the 302 and is there any other mods I may have to do to make this work?
The bellhousing and transmission and clutch will work. Be sure you watch the clutch linkage used to be sure you have what you need there! Watch that external balance to be sure the 351 (whatever type it is) has the same external balance as the 302 you have. If you mix and mismatch the external balance wrong you will have a shaker hood, and not in a good way.

I generally used my 302 parts from Fox model mustangs on 351W blocks, and the reverse would be true.

What 351 is it?? What 302 do you have??

Tom
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Unread 01-19-2009   #7 (permalink)
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49 cubic inches......

No Replacement For Displacement........
 
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Unread 01-20-2009   #8 (permalink)
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Buy it thats a great deal!!!
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Unread 01-20-2009   #9 (permalink)
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Goin to pick the car up tonight! I will know more about what block and such is in it tomorrow evening when I start some research! The guy doesnt have alot of information about the car because this was all done before he bought the car! He has too many projects going at once and wants to unload it!

The 302 block that I have is a roller motor out of a 87 lincoln Mark VII. I started this project 5 plus years ago and just now getting the time to get back to it!

Thanks for all the information Guys!
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Unread 01-20-2009   #10 (permalink)
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Difference Between 302 and 351-stang.jpg 1988 Stang
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Unread 01-20-2009   #11 (permalink)
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Quote:
Originally Posted by 1BDTOY View Post
Attachment 59427 1988 Stang
Is that mustang in Tulsa, Oklahoma?
I was checking out Craiglist and saw one that looks exactly like that with a 351W in Tulsa...

Mustang fox body/race car/drag car
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Unread 01-20-2009   #12 (permalink)
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Salem IL area! Im not exactly sure where the car started out at but i believe he bought it from a guy in STL.
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Unread 01-20-2009   #13 (permalink)
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Quote:
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Salem IL area! Im not exactly sure where the car started out at but i believe he bought it from a guy in STL.
LoL. There I go not paying much attention again...
I looked closer at the picture you posted and they're definitely different.


My bad.
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