Drivetrain conversion

[Zigy]

Hi, I have a 79 k2500 that I'm going to do a conversion on the drivetrain.
I would like to know if the info I have is correct and I have a couple questions as well.
I have picked up a rebuilt 27 spline 700r4 and a np241c 27 spline passanger side drop transfer case as well. I heard that there is two spline counts for this combo. 27 spline is for a half ton and there is a 32 spline for a 3/4 ton. Is this true?
Is there any reason why a can't run a 27 spline count in my 3/4 ton truck?
Also the transfer case I bought didn't come with driveshafts or yokes.
I was wondering if I will need any special driveshafts or will I need to only have mine shortened? Last of all is a question on yokes.. Can I buy a slip yoke for the back and a yoke for the front that is going to match my 3/4 ton driveshafts and my 1/2 ton transfer case?

Thank you so much for any advise you could share.

[andrewmp6]

Unless you run a tire bigger then a 37 your fine with that t case.I believe you could buy the right size yokes or worse case use the smaller ones and conversion u joints.

[Zigy]

Thank you Andrewmp6,
I'm not sure what a conversion u joint is but it sounds like a cheeper way to go.
Rather then trying to find theses yokes.
What about the drive shafts?
Is it better to shorten and use my 1979 ones or do I need a two piece or something?

Thanks again for your input

[andrewmp6]

A conversion u joint is two different size u joints mixed together and can buy them at any parts store.Driveshafts just depends what trans and t case vs what your swapping.Worse case you can have new driveshafts made most big diesel shops can do it.The one around me charges 350 a shaft.If you do get new drive shafts made make sure you measure them how they want it and make sure its right once they make them you bought it.