I have the same freewheel on a cruiser and that 34 low is super nice to have. The Shimano
https://www.amazon.com/Shimano-Speed-Freewheel-14-34-MegaRange/dp/B002OKJRUS
may have a more useable range only going to 14 vs 11 on the Drift Maniac but may be harder to find.
Dont forget you will need a special tool to remove the freewheel.
This is what I put on my Dolomite. It makes for a pretty big gap between 1st and 2nd gears, but climbing hills is much more tolerable now. 7th gear is a little higher than stock too, so top speed improves a little on a flat or down hill.