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Old June 9th, 2011, 08:40 PM   #1
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Default Ford 302 stroked 347. Whats it worth?

Out of a 91 mustang fwiw. Newer rebuild on it. Full roller valve train, Trick Flow rocker arms, push rods. I would like to identify what heads are on it. Casting's on the top of the head's say WORLD and WINDSOR. I cannot find any other casting #'s at this time. Is this an after market iron head, or a stock 351 head?
The exhaust ports also were larger than another 302 head fwiw.

I pulled this in great running condition because it ran like a 1/4 car (says the lady that owns said mustang). She wanted a reliable stock engine and some other de-modifications to make it more factory than when she bought it. So is it worth paying the core and keeping. I would guess that when built this engine would have cost $2000-$3000. Granted it is presently just a long block.
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Old June 9th, 2011, 09:15 PM   #2
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If the heads say world on them I would have to say that they are aftermarket World Products Windsor Sr or Windsor Jr heads. The difference between the two are larger valves and intake runner size. I would guess it is worth a little money considering what I had into my 302, hell the heads alone are 900 new. What is the core price? . It's hard to say what it is worth without knowing what the internals are, but I would guess it was all of 2g to build with machine work etc...
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Old June 9th, 2011, 09:18 PM   #3
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Yeah what is the core price?????
I thought you were going to let me know what was going on with this?
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Old June 10th, 2011, 07:38 AM   #4
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I'll pay the core price if you decide you don't want it!
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Old June 10th, 2011, 09:46 AM   #5
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I am not a Ford guy so someone explain to me why you would want to stroke a 302 into a 347 rather than just buy a 351W...is there something better about a 347 vs 351W? Just asking because I have no idea.
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Old June 10th, 2011, 10:12 AM   #6
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I am not a Ford guy so someone explain to me why you would want to stroke a 302 into a 347 rather than just buy a 351W...is there something better about a 347 vs 351W? Just asking because I have no idea.
The same reason every truck doesn't run 2 1/2 ton rockwells.
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Old June 10th, 2011, 10:33 AM   #7
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The same reason every truck doesn't run 2 1/2 ton rockwells.
That is not a logical reason...they are both small blocks and basically the same thing? Kinda like a 305 vs 350 Chevy? Nobody in their right mind would stroke a 305 because you can get a 350 for the same money and stroke that so why would you want to stroke a 302 instead of a 351 when you can get a 351 for dirt cheap and put the money in that and get more horse power. I never see a stroked 305 not that they don't exist but yet I see all kinds of 347's that's why I was wondering if there was something special about them that I don't know? Like are they more stroke/bore square and capable of higher rpm's than a 351? Just asking.
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Old June 10th, 2011, 10:39 AM   #8
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Same reason people destroke a 400 into 377 and like it better. a 347 is a high winding strong pulling engine and are a very popular setup
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Old June 10th, 2011, 11:02 AM   #9
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Same reason people destroke a 400 into 377 and like it better. a 347 is a high winding strong pulling engine and are a very popular setup
using the same logic, for $500 more, you can stroke a 351W to a 427 that revs to the moon
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Old June 10th, 2011, 01:36 PM   #10
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That is not a logical reason...they are both small blocks and basically the same thing? Kinda like a 305 vs 350 Chevy? Nobody in their right mind would stroke a 305 because you can get a 350 for the same money and stroke that so why would you want to stroke a 302 instead of a 351 when you can get a 351 for dirt cheap and put the money in that and get more horse power. I never see a stroked 305 not that they don't exist but yet I see all kinds of 347's that's why I was wondering if there was something special about them that I don't know? Like are they more stroke/bore square and capable of higher rpm's than a 351? Just asking.
External dimensions. For Chevy, 305's are about the same size as 350's IIRC, so yeah it's a no-brainer. For Ford, 302's are smaller than 351's.

I don't exactly recall how much smaller, but the 302 is also the stock engine in Mustangs. So you have a engine already, and it's guaranteed not to have clearance issues, at least putting it back in something that had it. It's still easier to stuff into other applications too.
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Old June 10th, 2011, 05:11 PM   #11
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A 351w is about 2" wider than a 302 so it is not a direct replacement in most vehicles that come standard with a 302.
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Old June 12th, 2011, 09:20 PM   #12
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A 351w is about 2" wider than a 302 so it is not a direct replacement in most vehicles that come standard with a 302.
X2, wider and talller. Also the cubes may be close but the 347 has the benifit of a lighter rotating assy and smaller main brg sizes (less brg speed/friction).
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Old June 12th, 2011, 11:20 PM   #13
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Quote:
Originally Posted by Disturban View Post
That is not a logical reason...they are both small blocks and basically the same thing? Kinda like a 305 vs 350 Chevy? Nobody in their right mind would stroke a 305 because you can get a 350 for the same money and stroke that so why would you want to stroke a 302 instead of a 351 when you can get a 351 for dirt cheap and put the money in that and get more horse power. I never see a stroked 305 not that they don't exist but yet I see all kinds of 347's that's why I was wondering if there was something special about them that I don't know? Like are they more stroke/bore square and capable of higher rpm's than a 351? Just asking.
I've seen a handful of 331'ish SBC's (stroked 305's). Biggest reason you won't see much of that, is the 305 has a small bore (smaller than the 350's 4" bore).

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Same reason people destroke a 400 into 377 and like it better. a 347 is a high winding strong pulling engine and are a very popular setup
For some reason, everybody I've ever seen that talked about doing a destroked 400 thought they could make it run at 9,000 RPM (or some insane high RPM)
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Old June 13th, 2011, 01:20 AM   #14
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I prefer the 347 over the 351 due to weight savings, keeping my stock accessory brackets, and if I mess up the block, they are far more plentiful than the 351w.
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Old June 13th, 2011, 09:05 PM   #15
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This motor is now for sale. Pm for contact info.
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