Drive shaft length and cross member placement for trans swap

[cwest]

I'm in the last few steps of a TH400/NP208 to SM465/NP208 swap with my 86' K20.  Do those two combos use the same drive shaft lengths and cross members holes?  I'm assuming they are the same because the transfer case to trans adapters for both combos are different lengths which I'm hoping is an accommodation for both set-ups to use the same drive shafts and cross member placement, but just thought I'd get some input from the forum.

[Dan75k20]

I switched to a np205 from a np 203 thus needing a longer driveshaft and am using a drive shaft from a stick shift truck it fits perfectly

[roundhouse]

Measure the length from where the bell housing bolts to the engine to the rear driveshaft yoke on both setups

[bake74]

     No & NO.  The best and easiest way to me is go ahead and get the engine, trans, transfer case combo in.  Measure the cross member and re-drill and mount.  Measure drive shafts and have made or modify yours.
     See here for th400 dimensions.
     See here for SM465 dimensions.

[Irish_Alley]

keep in mind that sm465 dimension doesnt include the bell housing

[Dan75k20]

Bake is right I just got lucky that the th350 with a 203 and 205  cross members mount in the same place on a 75 and the drive shaft has a slip yoke built in

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