Looks sharp!
The turn indicator stalk on your car has a unique quality feel and precision to it that modern Pirsche owners have no idea or experience with!!! I guess that it's original Boge self leveling rear suspension is long gone or maybe it is a E that was optioned with S suspension. If it came with the optional gas heater, disconnect it!
Also you.might look into getting a modern ignition system for it. You will gain hp and it will run smoother and get better mpg. If you don't, at least get a Bosch sports coil for it.
And if you haven't changed the clutch cable yet, you might consider doing that as overtime they stretch and hasten the breaking of the clutch pivot pin.
Momo made a slightly smaller and same design steering wheel for 911s back then so if you want a smaller wheel that looks close to oem you might check ebay or regional porsche club parts for sale listings.
I'm not sure about putting a HD coil over suspension on a targa ,the rear wheel areas have a lot of flex in them stock and a small roll cage and not a full race roll cage to drastically stiffen the car might not get you much or could lead to body panel issues.
All in all, they are a joy to drive. No power steering, no hydraulic clutch and the car has a light weight, visceral point and shoot handling ability that no modern Porsche can match.
Good luck with it!!!