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Old April 24th, 2009, 10:41 PM   #1
NewGuy
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Default 351w crank and rods in a 289/302 block???

How many have heard of this? Also what would you end up with??


I'm looking to build a nice powerful motor to push some other cars around! The motor will be backed by a c4 or c6 trans and a locked 9" with 4:10 gears.


Should I go with a built 289/302 or a 351w?
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Old April 25th, 2009, 01:54 AM   #2
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This will not work due to the fact that the main bearing journals on a 302 are 2.250" and they are 3.00" on a 351.

Going with a 351 will give you the most power from the least amount of investment. But you can build both fairly cheap to make some good HP. One other thing to look at is some of the newer EFI 302 were factory roller cam.
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Old April 25th, 2009, 08:16 AM   #3
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Originally Posted by bigblockford79 View Post
One other thing to look at is some of the newer EFI 302 were factory roller cam.
351's also.
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Old April 25th, 2009, 09:28 AM   #4
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Best bang for the buck is a 393W

Stock 351W block
Eagle cast 3.85 stroke crank.....less than $300
Stock 351w rods
302 pistons @.030 over is a 393
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Old April 26th, 2009, 01:12 PM   #5
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Best bang for the buck is a 393W

Stock 351W block
Eagle cast 3.85 stroke crank.....less than $300
Stock 351w rods
302 pistons @.030 over is a 393
GOOD TO KNOW!

what kind of hp will a 351 block take b4 it splits in half like a 302 above 500 hp?
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Old April 26th, 2009, 01:27 PM   #6
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Originally Posted by sandman86 View Post
GOOD TO KNOW!

what kind of hp will a 351 block take b4 it splits in half like a 302 above 500 hp?
If I was building one for above 450-500 hp I would not do a 393, do a 408 instead with aftermarket rods.


Any 351w block, with quality parts and machining, will handle 600hp without trouble. RPM's should be kept less than 7200-7500 as the 2 bolt main caps start to "walk" around there depending on stroke.

The 69-74 blocks are slightly stronger and can have 4-bolt caps added.
I have seen those up to 750+ hp survive.

My last mustang engine:

84 351w block
4" cast crank
H-beam rods
SRP pistons
Canfield heads
Super Victor intake
Solid Roller

Was right about 600hp, shifted at 6800, ran 10.20's @ 3100lbs

New engine is going to be a 420" small block ford using a 69 block.
Looking for 700hp this time
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Old April 26th, 2009, 02:05 PM   #7
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Get the early high nickle content 69 -71 block, or a Mexican then add a stud girdle, Use the Scat H beam rods, Crank & Forged 302 pistons. Get a set of 69 - 71 WF 351 heads with the large valves. You will have a screamer. Will not break in 1/2 like a 302
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