71 dodge demon steering and suspension questions

Hey guys, i am working on my 71 dodge demon and it has a 6cyl with auto trans in it now but im converting it to a 340 4 speed car and i have some questions about any steering or suspension changes i would need to make.
1. Do i need to change the 6cyl drag link to a
V8 drag link?
2. Can i use the 6cyl. power steering gear box with the 340 V8?
3. Will the 6cyl. power steering pump bolt to the 340(have the brackets).
4. Should i leave the 6cyl. torsion bars in it or upgrade them to V8 torsion bars?
5. Will i need to change the rear leaf springs?
6. And what is the best shocks to run?

Thanks for the input and advice.