I dropped a 350/350 combo in my 1950 3600.
In order to accommodate the power steering box I reversed the lower shock mounts (left to right and right side to left), drilled out the upper mounts and leaned the shocks towards the rear.
Here's a pic of the passenger side:
http://i671.photobucket.com/albums/...00%20Chevy%20Truck%20Project/PICT004.jpg
It was fairly easy to do with the sheet metal off.