Re: crank shaft help
[Re: John_Kunkel]
#1576664
02/11/14 03:14 PM
02/11/14 03:14 PM
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Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,376
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Sounds to me that you need: 1: Any 440 2. A long-tail 413 crankshaft to install in the 440. Those long-tail 413 crankshafts are nearly worthless, as a matter of fact this is the first application of one that I have heard of!
Otherwise, an early 413 would give you a nice boost in cubic inches.
To get even simpler, you could find a 400 block and build it using the 361 crank you already have.
Helpful hint: All B blocks (350,361, 383, 400) are dimensionally similar, so crankshafts will swap between any of them. All RB blocks (RB383, 413, 426, 440) are dimensionally similar and crankshafts will swap between any of them.
R.
Last edited by dogdays; 02/11/14 03:18 PM.
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Re: crank shaft help
[Re: RTSrunner]
#1576667
02/12/14 08:15 AM
02/12/14 08:15 AM
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Joined: Aug 2007
Posts: 1,531 AZ
Mike P
pro stock
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pro stock
Joined: Aug 2007
Posts: 1,531
AZ
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"....With the crankshaft being longer on the early BB wouldn't a simple spacer equal to the difference of the later crank fill the void? This would put the flexplate in it's original (in this case 361) position....."
Just the opposite as wants to use a later Big Block.....the newer motor will have a shorter crank flange and would pull the convertor too far out of the pump.
The options are pretty straight forward (though not what he probably wants to hear. A crank change in the later engine to the early long crank; early 413, and 383 RB for a 440 or 350 or 361 crank for a R engine. The other option is a trans swap John outlined or a later linkage shifted transmission adapted to the push button shifter (I think the 300 club used to offer an adapter for this). Of course then you would need to do something aobut the emergency brake.
1957 Plymouth (Hemi, Dual Quads, A833 4 Speed 9 1/4 w 4.10) Sold 1937 Dodge Pickup (Hemi, 6X2 intake, 46RH, Dana 60 w 4.56) Sold 1968 Plymouth Valiant 2dr sedan (354 HEMI, 46RH w/4.30 gears) under construction
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Re: crank shaft help
[Re: Supercuda]
#1576669
02/12/14 01:07 PM
02/12/14 01:07 PM
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Joined: Aug 2007
Posts: 1,531 AZ
Mike P
pro stock
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pro stock
Joined: Aug 2007
Posts: 1,531
AZ
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"...You need to re-visualize this......"
Yup you're right I misunderstood where the spacer would go.
1957 Plymouth (Hemi, Dual Quads, A833 4 Speed 9 1/4 w 4.10) Sold 1937 Dodge Pickup (Hemi, 6X2 intake, 46RH, Dana 60 w 4.56) Sold 1968 Plymouth Valiant 2dr sedan (354 HEMI, 46RH w/4.30 gears) under construction
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Re: crank shaft help
[Re: Supercuda]
#1576672
02/13/14 03:42 PM
02/13/14 03:42 PM
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Joined: Jan 2003
Posts: 26,470 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 26,470
Rio Linda, CA
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The configuration of the crank flange is all different. Bottom line, this isn't doable without changing to the early crank.
The INTERNET, the MISinformation superhighway
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Re: crank shaft help
[Re: John_Kunkel]
#1576676
02/15/14 06:15 PM
02/15/14 06:15 PM
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Joined: Sep 2003
Posts: 20,235 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 20,235
north of coder
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Quote:
Quote:
You need to re-visualize this.
early BB has a longer crank than a later one.
A spacer for the later crank would fix that.
Nothing special about it, though I dunno if anyone makes them, but building one should be easy for a machine shop or someone with the machine tools. Not sure if the early cranks use nuts and bolts
That's the rub, the early converter has 8 studs with nuts on the front side of the crank flange.
as I understand it, the crank flange pattern is the same as the 8 bolt later hemi. the hole size is 7/16", which is close to the tap drill size required for a 1/2-20 thread which is 29/64" [.453]. so a quick ream and tap would make the early crank flange useable for a modern flexplate. am I thinking right ?
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Re: crank shaft help
[Re: moparx]
#1576677
02/15/14 09:06 PM
02/15/14 09:06 PM
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Joined: Jan 2003
Posts: 26,470 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 26,470
Rio Linda, CA
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You don't understand, the early converter has eight studs, about 3/4" long, welded to the face of the converter; (IOW, no flexplate) the bolt circle of the eight studs is the same as the bolt circle on the crank flange....to make the early converter work on a late crank flange you'd need the converter studs to be 2" long to go through the needed spacer.
The INTERNET, the MISinformation superhighway
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Re: crank shaft help
[Re: John_Kunkel]
#1576678
02/16/14 12:54 AM
02/16/14 12:54 AM
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Joined: Jan 2003
Posts: 10,840 Freeport IL USA
poorboy
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,840
Freeport IL USA
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Quote:
You don't understand, the early converter has eight studs, about 3/4" long, welded to the face of the converter; (IOW, no flexplate) the bolt circle of the eight studs is the same as the bolt circle on the crank flange....to make the early converter work on a late crank flange you'd need the converter studs to be 2" long to go through the needed spacer.
And then you would need to figure out a way to install the nuts on onto the studs that are attached to the converter, between the crank flange and the block on the late model motor. Gene
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Re: crank shaft help
[Re: poorboy]
#1576679
02/16/14 11:28 AM
02/16/14 11:28 AM
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Joined: Sep 2003
Posts: 20,235 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 20,235
north of coder
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Quote:
Quote:
You don't understand, the early converter has eight studs, about 3/4" long, welded to the face of the converter; (IOW, no flexplate) the bolt circle of the eight studs is the same as the bolt circle on the crank flange....to make the early converter work on a late crank flange you'd need the converter studs to be 2" long to go through the needed spacer.
And then you would need to figure out a way to install the nuts on onto the studs that are attached to the converter, between the crank flange and the block on the late model motor. Gene
you guys are right. I was thinking of the swap to a new style trans [62 & up] to the old crank flange, not reusing the old trans. sorry.
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