69 k20 rockwell to np205 swap

[tinman_local2]

I swapped out the old t-221 for a np205. I didn't move the transmission cross member. It appears the distance from the front of the bell housing to the center of the motor mount is a little short. The mounting adapter on the 205 is 2 1/4" longer than on the 221. Are there any problems with moving the front cross member forward a couple inches. I'm down to bare frame so it won't be hard to do, just don't want to run into trouble later.

[CUSTOM/10]

I can't answer your question, but I can give you some info that might help you avert another issue. The t221 cross member is 1" shorter ( top to bottom ) than the np205 cross member. So if you use the t221 cross member with a np205 your t-case might be hitting the floor of your truck !

Gary

[gmc684x4]

I have done this swap several time I used the complete tranny transfer case and crossmember for the swap
Which transmission did you have sm420 or sm465 ?

The 465 np205 with matching crossmemeber
It will sit back further and need new holes
420 t221 vs 465 205 combo use different drive shaft length as well I can not say about the 465 t221 combo as I have not played with that setup

[tinman_local2]

I've got the 465. I moved the front cross member forward. I think it will help with the transfer case interference with the cab leaving the original trans cross member where it is. Hopefully this isn't a mistake.

[CUSTOM/10]

If the t-case does hit the floor you can get a t/c lowering kit, it's basically some spacers and longer bolts.

Gary

[gmc684x4]

When swapping i kept motor in stock 4x4 location and used drive shafts from donar vehicle that I swapped tranny tcase from
Is your front shaft a double cardigan joint ?
Most of the diff is a 420 tranny is shorter then a 465

Moving the engine forward you will have to watch for clearance issues with the front diff pumpkin which is why the engine is in the back position

[tinman_local2]

Originally Posted by gmc684x4

When swapping i kept motor in stock 4x4 location and used drive shafts from donar vehicle that I swapped tranny tcase from
Is your front shaft a double cardigan joint ?
Most of the diff is a 420 tranny is shorter then a 465

Moving the engine forward you will have to watch for clearance issues with the front diff pumpkin which is why the engine is in the back position

The drive shaft is the double jointed one. I've got a 4" lift, so I don't foresee any clearance issues with the differential. I'll have to have the drive shaft lengthened. The rear will need shortened.