Thoughts on swapping a slant 6 with a 383

-I need to know if I can keep my power steering
-Would manifolds fit better or headers
-Is there any clearance issues with the heater

If there's a will, there's away. But I think all of these items are going to cause you difficulties. Manifolds would be great, but the right ones are $$$$, and headers are not EZ either. My situation is no heater, no power steering tho, so I'll go make the popcorn....