D- Moser does...about $150
Part # TY650 - Powerglide Transmission Yoke (1350 series) - 27 Spline - Billet Removable Straps
Product Description
Transmission Type: GM Powerglide,
Saginaw 3&4 speed, Muncie 3 & 4 speed,
Warner T4-T5, Turbo 350 & 200, 4L60
700R4, Olds Jet Away, Buick Super Turbine
Brinn, Bert 1963-1997
UJoint: 1350 Series
Spline: 27
Spline Diameter: 1.172"
Seal Diameter: 1.500"
Material: Machine Forged Steel
Measures: 6.0" from Center Line of U-Joint to End, 3.625" from Back of Yoke to End.
*Removeable Billet Straps
** Also works with Deadenbaer Roller Bearing Case
I got your PM about the tune, Id try it...without knowing that car it hard to say but I think you'll be adding some weight to get it to work long term.