Are you putting in a big block?? or small block??
Yes the big block do have a different K frame.
The spool type mounts are in a different location.
I know one is for sale if needed.

IIRC,the oil pan is body specific (A/B/E/C,etc) to clear the steering.
Here is a link to help you tell the differences.
http://www.rosevillemoparts.com/reference_enginetrans3.php

'68 Newport Custom Barge on a Budget!! BOAB
1973 Satellite WAGON! 318- 3 on the tree!!
2008 Chrysler 300c HEMI!