Th400, SWB, driveshaft length?

[SinisterC10]

Anyone know what length driveshaft I need for my 84' shortbox with th400?

I am going to have Mark Williams racing build me a driveshaft but I didn't know if anyone knew off the top of there head or had one they could measure for me.

10 bolt rear also.

[Captkaos]

Measure your truck.  End of output to the yoke flange and give that to them. This gurantees it to fit.  They probably have a form they require.

Chris Lucas
73-87chevytrucks.com
squarebody.biz