425 nailhead and dynaflow

You don't necessarily need a crank from a '63 425. The difference between a 401 and a 425 is in the bore only; the stroke is the same therefore, any later 401 crank 62-63 would work in the '64 425. Then your back to the basics of following the thread about the twin turbine dynaflow that connects to a torque tube.

Ed

 

Where are you located nineteen?

I live in southern california and am kind of going through the same thing you are.

I picked up a 64 425 to put into my 57 special. I didnt want to use the dynaflow so instead I picked up an SP400 out of a 65 buick. I will be swapping the rear end out and putting in some kind of 4link.

Im not sure how much its going to cost you to get any of the stuff to adapt your trans etc... but I have an extra SP400 I posted in the for sale section. The price is negotiable, I was actually mainly looking to trade it for other stuff I need.

 

I have a '63 DynaFlow crank if interested, It's standard size mains & rods. depending on where you call home it could get kinda $$$$ to ship. I,m in Ct.

Tom T.

 

I'm up in nor cal sf bay area I get down to so cal I few times a year though:3gears:

 

whats the cost of the crank and shiping to ca 94518

Cheers mate :beer

 

I am speculating here, but although the 401 crank will physically fit a 425, I wonder if it is balanced the same way. The 425 has a larger bore; therefore it has larger (and I would assume heavier) pistons. It would be interesting to check the respective part numbers of a 401 and a 425 crank for the same year.

 

The balance is taken up by the harmonic balancer, but mostly the FlexPlate /Flywheel.

 

P.S. If your going this far you should get the assembly balanced anyway.

 

John which doc ? ou:

 

doc, from Tennessee ;
http://www.v8buick.com/member.php?u=4236

 

Thanks again bulldog and to everyone for all the info, I been giving this alot of thought.

I'm leaning towards updating her to open drive line th400 with 64 rear end, I think the 425 nailhead is the only way to go,:laugh:
but i still like the dyna flowwwwwwwwwwwww

 

me, too.
Here's some more to chew on;
http://www.v8buick.com/showthread.php?t=225579

 

Dam it :gp: :grin: now i'm leaning back the other way!

 

I just drove mine down the mountain and back up. On the steepest part of the uphill grade; I gave the gas a punch, the converter vanes changed pitch and, the big old Roadmaster took off up the hill like a rocket!
:beer

 

My super will be back from fab in about a week, new airbags new dual master cylinder, brake lines etc .

I'm going to driver her over the summer and maybe I will make up my mind o No:

 

All right! I'm planning on driving mine more this summer, too. Whichever way you go; it's going to be a good ride.
:TU:

 

If you go with the open driveline method, you might want to see if someone has done the two link rear suspension, like the 60-72 Chevy pickups had. I would think this may be the most simple approach. I currently am looking into this idea.

 

If , I understand it correctly; On torque tube drive, the thrust is carried by the transmission mounts. And, on open drive the thrust is carried by the rear axle mounts. (or, not?)

 

Yup!

 

That's why the mount on the trans. crossmember with the 3 studs sticking out each end is called a THRUST PAD.