This could be a fool’s errand you are embarking upon. Rolling past your ball isn’t meaningful with more context on how far you hit your drive on this instance. What if Dad hit his Sunday best with your driver? 220 yards total at 70 yrs young is solid! How much of the 220 is in the air?
If he’s generally getting good distance and dispersion with a G440 Max 12° on small + hosel setting, test his club at standard loft with weight heel side. If the 1° of face closure on his G440 Max makes his slice go away then he needs a draw biased head. Ping is heavy headed even with a counter balanced shaft. Is the club an HL model with the lighter back weight?
If Dad’s on the hunt for a new driver now consider Elyte X in 12° might be good with Vanquish 4R. Test the light weight model TM Max Lite 12°, Callaway Elyte Max Fast and Titleist GT1 12°.
In my fittings with older golfers I like to see how they respond to an overall lighter system. IMHO, many older golfers over estimate their driver distance and think they hit it too high. I live in a pretty dry area so many of these older golfers hit the ball really low and are dependent on maximizing their roll.