340 cam change

Since I have NO idea or clue what cam is in my 340, and if I have to take it apart just to determine what it is, I might as well think about making a cam change. The motor has X heads and adjustable rocker arms, look like the 273 hp cast iron units. I don’t know if the current cam is hydraulic or mechanical but I am guessing it is a hydraulic.
Sounds like an early type small hemi grind.
Trans- 727
Stall - don’t know I will change if needed
373 or 391 gear
Edelb RPM intake
AVS2 650 can change but I would like to use it.
X heads
TTI headers
I am in my 70’s so I am pretty sure I am Not racing the car.
What would you buy, Flat or Hydraulic?
Lumpy is good.
I like stump pulling set you back in the seat.
Which grind ?
I am waiting for delivery on a compression gauge.
I know I will get many answers.
Thanks