Do some Push-ups and some reverse swing training.
Also look into a swing speed training system.

Shafts won't necessarily give you distance...but athletic training may give you a few yards.

Cheers,
Dr. K

...Or grow younger if you are over 50... But yes, athletic training has benefits for both golf distance and life distance.

Working with a pro on fitting the correct head and shaft to you and your swing is far beyond and better what any of us could recommend on a discussion forum.

Having just gone through an iron fitting, once we decided on the head, we then worked through 4 shafts until I got the one with 10 more yards than my original choice. So a shaft can be part of the equation.

As a general comment not necessarily applicable to your swing, it is not common that a driver head speed of under 90 mph is optimized with a driver loft of 8.5 degrees. Even a shaft may not make much of a difference.

Craig...I have a Hzrdus Smoke 5.5 regular shaft that plays to 44.5” if you are interested. If you are, just pm me. Thanks