I have a J. C Higgins Model 50 in 30-06. The trigger was heavy and unadjustable.
I installed a Timney, was able to get a lighter, about 3 pound pull without any problems. I am using the rifle safety, so I got the Timney without a sear blocking safety. I think a three pound trigger is as light as I want to go on a hunting rifle.
This has been at least ten years, but I do not recall having to remove any wood in the stock for trigger installation.
The original stock is very light. The rifle recoils hard and I installed a rubber buttpad to reduce the felt recoil. I also had to install a 03 stock bolt behind the recoil lug to prevent a stock crack from getting larger.
I do not recall if this action will fit in a standard M98 stock. It should, but I would have to disassemble the thing and try that to find out. Those FN actions would take a M98 bolt, cause I tried that.
If you notice, this rifle is much lighter than 1980's and later rifles. This rifle was built just after WWII and the typical buyer was an ex Dog Face who carried a 9 lb Garand all day in the war. This was forty years before 4 wheeler's, so you had to walk to your hunting location. Ex Dog Faces were no longer interested in hauling heavy iron all day, so the market gave them light rifles.