Road king or most touring shocks work fine on a Sportster although my preference was to go with Progressive .. Touring shocks were made for a heavier frame and if use more than 10 PSI on them with a Sporty the Ride is Harsh .. Progressive 440's are the Ultimate with a Sporty owned enough Sportsters over the years know this to be a fact ..
Very nice, the shot of you sitting on the Sporster looks like a mid-seventies Ironhead. Is the last pic a 79? And the middle shot must be fairly new needing love bug protection

. Ford Fairlane 500?