Slant 6 A Body advice. Engine and chassis.

I have a few questions and I am looking for advice and maybe some tips from people that may have built what I am trying build.
I have a 1972 Duster, slant 6 3 speed manual trans with a 323 rear diff.
I want to make this car more practical and fun to drive.
I have already switched it to factory Mopar electronic ignition with and Orange spark box. The car has manual brakes and power steering.
Questions.....
I dont want to make a "hot rod" just a better motor. So I want it to breathe better is there some head work that can be done to improve intake and exhaust flow? If so what should be improved? porting? changing valves? I want this to be fun and keep it on a budget, thats part of the fun.
In the end I want to keep the base engine intact. No cam change and such. I have an extra cylinder head what mods should be made. I would also like to run a single one piece header and a multiple carb intake. maybe 3 1 bbl or 2 2 bbl carbs. Good or bad idea?
I would also like to change the trans to a 3 speed with an overdrive. This seems to end up turning into a can of worms. So with this question I hope to hear from some one that has done this swap so I know what to look for at the swap meets.
I want to loose the power steering, Its too "easy" and no road feel. What is recommended for a manual gear?
Suspension, I am going to lower the car front and rear Blocks in the rear and tun the torsion bars a bit! The car has no sway bars. Looking for recommendations on size and brand names.
This is a fun budget project using craigslist e-bay and swap meets. Any advice would be great!


you can adjust the power steering to get a lot better feel very easily. there is and link to an article that shows how to do it. easy really just add or subtract some washers at the power steering pump to get the feel you like. if you go manual you need a steering shaft and coupler for a manual box or an adapter(some get flaming river or similar joint)to work with the power steering shaft and the box

I did the adjustment and can't wait to get the dart running so I can tune the steering to what I like. remember FAT tires in a manual box are a bear to parallel park with or slow speed maneuvering , yeah you young guns can do it but some of us older guys don't want to (or at least I don't)