64,

         You'd have to talk to Chris Larsen, if you can find him. Jerry Christianson may know how to contact him. Jerry built the manifold for Chris. 

Frank/Rebop

Bristol, In ( by Elkhart) 

hey guys. I called up jerry the other day to shoot the breeze and the subject of the blower setup was brought up.  he said that when he built that blower setup on t-bird, he use a scrub damper. he said that the key way was in the wrong spot and there was a couple thousands difference on the inside of the hub. does anyone have the internal dimension of the harmonic balancer hub(the part that slides onto the crank snout)

1964:

You didn't say whether you wanted the dimension for a chev or Ford damper, but the adaptor I made to adapt a sbc Fluidamper to my Y was bored to 1.255 ID.

John

John - "The Hoosier Hurricane"

the dimension i am looking for is the OD on the crank snout. If I know that, I can figure the rest out. got lots of scrub guys that are friends of my dads, and a couple of ford guys.

the reason i am asking for the dimension is, when I talked to jerry, he said that he had used a scrub aftermarket damper and had it machine to fit the crank snout. he also made it very clear that the two bolt pulley setup wasnt strong enough and thats y he used the scrub damper, for its three bolt pulley bolt pattern.  but i am from the old school thinking, no chevy parts should be used on a ford so, if i get the od dimension of the y-block crank snout, i can start my search for a ford damper that i can use.  also, are y-blocks internally balanced or externally.

The snout is 1.250.  Small block Ford uses the same size front seal as a Y, so maybe the snout is the same size also.  FE shout is larger than a Y.  The Y is internally balanced.  I used a Fluidamper on my race Y, it is not a gm part, it was just made to fit a gm. 

John

John - "The Hoosier Hurricane"

the fluid damper that you used, was it a custom jobby or is there an actual part number from a catolog.

that 1.250 is the OD of the crank snout???? also, i am looking at the specs for the ford fluiddampers and they  say the bore is min-1.374/max-1.375. is that the ID of the damper snout??????

The one I used was an off the shelf sbc damper.  I made an adaptor hub to fit it to the Y block, the hub on the chev damper is too short to use with the stock Y timing cover.  I don't know the number, but it was a 6" internally balanced damper.  I had to also make pulleys to drive the alternator and blower.  There are numerous pulleys made for sbc, so you could probably find something that would work.  The 1.375 dampers have too big a bore for a Y block.

John

John - "The Hoosier Hurricane"

does anybody have the damper snout length??????  is it possible to make an adapter bushing so that I could use a ford damper?  to go from the y-block crank snout 1.250 to the sbf 1.375? is that idea feasible???