crankshafts
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Freshman User
Joined: Jul 2001
Posts: 34
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crankshafts
I'm sure someone has posted pictures of the flanges on
the various FE cranks, but now that I'm looking I can't seem to find any of them.
There is this old engine shop in the town I live in and the owner is letting me dig through piles and piles of cranks to see if I can find the 428's.
I have seen the 390's with the square notch, but thought someone said the 428's had a notch and a half moon shape. Is this correct or do I just have to measure the stroke on each one? I talking in the hundreds of cranks.
Can somone post a picture?
the various FE cranks, but now that I'm looking I can't seem to find any of them.
There is this old engine shop in the town I live in and the owner is letting me dig through piles and piles of cranks to see if I can find the 428's.
I have seen the 390's with the square notch, but thought someone said the 428's had a notch and a half moon shape. Is this correct or do I just have to measure the stroke on each one? I talking in the hundreds of cranks.
Can somone post a picture?
Elder User
Joined: Aug 2001
Posts: 962
Likes: 2
From: Collierville, TN
crankshafts
I oculd be wrong, but my recollection is that all 410/428 cranks have 1U casting numbers (or one of the variations cited above), and no other cranks are "1U." The square vs. half moon notch is only necessary to distinguish 352/360 cranks from 390 cranks.
karlsd a/k/a "ksd"
69 F100 Explorer 360/C6
karlsd a/k/a "ksd"
69 F100 Explorer 360/C6
Post Fiend
Joined: Feb 2000
Posts: 5,130
Likes: 8
From: Brea CA
crankshafts
https://www.ford-trucks.com/dcforum/User_files/BBB/3b901e48421a148d.jpg
Hmmm... Here's a C4AE-B 390 crank with both the half-moon and the notch (hard to see here). Guess that theory is blown out of the water. Have heard that these older cranks are like that.
The 428 cranks will have either a 1U, 1UA or 1UB stamped on the #7 cheek. The one's I've seen have a small hole in the rear flange.
DF, you got any old 390 or 428 cranks for a sanity check?
Barry
Hmmm... Here's a C4AE-B 390 crank with both the half-moon and the notch (hard to see here). Guess that theory is blown out of the water. Have heard that these older cranks are like that.
The 428 cranks will have either a 1U, 1UA or 1UB stamped on the #7 cheek. The one's I've seen have a small hole in the rear flange.
DF, you got any old 390 or 428 cranks for a sanity check?
Barry
Tuned
Joined: Jul 2001
Posts: 430
Likes: 0
From: Deatsville, AL
crankshafts
The 390 that I have has both the notch and the half moon cut out. My '66 428 crank only has the notch and also has an extra counter weight on the front side of the center main bearing.
Bob
'66 7 Litre, top loader, 3.25 Traction-lock, Sidewinder Intake, SCJ Exhaust
'88 F150 LWB 4x2, XLT Lariat, 302, 5 speed, 3.08
'99 Ranger, 4x2, 3.0, 5 speed, 3.73 posi
Bob
'66 7 Litre, top loader, 3.25 Traction-lock, Sidewinder Intake, SCJ Exhaust
'88 F150 LWB 4x2, XLT Lariat, 302, 5 speed, 3.08
'99 Ranger, 4x2, 3.0, 5 speed, 3.73 posi
Cargo Master
Joined: Aug 2000
Posts: 2,931
Likes: 12
From: SW Michigan
crankshafts
Guys, I went out in the dark and stumbled around the garage for awhile. My 3.98 stroke crank (1U, from a 410) has a square notch and a round hole in the flange. My 390 cranks, a 67, 70, and unknown year all look just the same, but only the 410 crnak has the funky little weight in front of the #3 main, perhaps that is the best way to tell them apart. I also have two cranks with a half moon and a square notch in the flange, from blocks with an EDC casting # on them. The fellow who gave me the engines said they were a 1959 and 1960 352s, but I never checked the stroke on either of them. Dinosaurfan
Tuned
Joined: Jul 2001
Posts: 430
Likes: 0
From: Deatsville, AL
crankshafts
The cranks with the funky extra little counter weight were all 3.98 stroke cranks used in '66 and '67 410s or 428s (and probably some '68s as well.) I never noticed the round hole in the flange but mine has it as well.
The 428 CJs and SCJs cranks don't have that counter weight.
Bob
'66 7 Litre, top loader, 3.25 Traction-lock, Sidewinder Intake, SCJ Exhaust
'88 F150 LWB 4x2, XLT Lariat, 302, 5 speed, 3.08
'99 Ranger, 4x2, 3.0, 5 speed, 3.73 posi
The 428 CJs and SCJs cranks don't have that counter weight.
Bob
'66 7 Litre, top loader, 3.25 Traction-lock, Sidewinder Intake, SCJ Exhaust
'88 F150 LWB 4x2, XLT Lariat, 302, 5 speed, 3.08
'99 Ranger, 4x2, 3.0, 5 speed, 3.73 posi
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Senior User
Joined: Jul 2001
Posts: 270
Likes: 0
crankshafts
When I bought my 72 the guys add said it had a 390, he wasn't around when I went to look at and buy it. This was before I found out how to id a 360/390, I measured the stroke once and came up with 3.50", they checked for the half moon on the crank. I Barry's picture of the 390 crank it shows the half moon and then if that a small square notch just beside it, it's about 3/8"? If it is then I do have a 390 and I'll have to remeasure the stroke again.
So do some of the 390's have the half moon and then the 3/8" side by side.
Thanks,
Bob
So do some of the 390's have the half moon and then the 3/8" side by side.
Thanks,
Bob
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Freshman User
Joined: Jul 2001
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crankshafts
olddude,
I have a 360 crank and a 390 crank that look the
same from the flywheel end.My 428 crank has a very
small half moon about 1/8'' radius in it.I think from
all the posts you have seen that the only way to know
what the crank is will be to measure it.The 1u,
1ua and 1ub numbers are 428s or 410s but unless
its a steel crank measure before you lay any money out.
I have a 360 crank and a 390 crank that look the
same from the flywheel end.My 428 crank has a very
small half moon about 1/8'' radius in it.I think from
all the posts you have seen that the only way to know
what the crank is will be to measure it.The 1u,
1ua and 1ub numbers are 428s or 410s but unless
its a steel crank measure before you lay any money out.