From your question, I assume you do not have the owner's manual. The link at the bottom of this page will take you to the Henry website, and you can download the manual.
No. .22 Magnum and .22 Long Rifle are not interchangeable.
No
Best to ask a gunsmith for assistance.
Yes
1960
No. The WRF (Winchester Rim Fire) is a larger diameter cartridge. It is the same diameter are the 22 WMR (Winchester Magnum Rimfire) but is shorter than the magnum, It may be safety fired in a .22 magnum rifle, but not in a 22 LR. 22 LR ammo should NOT be fired in a rifle chambered for 22 WRF.
how do you disassemble a model 49 ithaca 22 rifle
As in .22 WMR? That is the full name of the cartridge- the .22 Winchester Magnum Rimfire- usually called the .22 magnum
Remington has made many models in 22 magunm
No, My grand dad gave me one. as the kid I am, I tried this before . The .22 magnum is to big to fit in the gun.
$125-$200
With the exception of a few revolvers made with interchangeable cylinders, the .22 LR and .22 magnum cartridges should NOT be substituted for each other. The .22 magnum is a larger diameter cartridge than the .22 LR. Firing a LR cartridge in a magnum rifle will result in a split cartridge case, venting of gasses, etc. They cannot be traded with one another.