Shorty Headers
If you want shorty headers just because(I did too) I did a install a few years back on a 68 Valiant 273.
Under Articles, How Too I believe. TTI shorties and their complete exhaust.
inertia made a good point,mine being a 273 with 2.76 rear I saw little benefit.
Yes the driver side down pipe may or may not be restrictive as it looks,designed to clear column shift cars.
As far as ease of installation,the easiest headers I ever did.
As stated above I bought them just to try as I installed over 20 or so sets of TTI long tube on various Mopars.