goodguys75,
First off I have to separate the rifle and the cartridge.
IMHO, you would be far better off with the Marlin 1895.
I believe the Marlin is far better able to digest serious hunting loads that are available.
The tube loading procedure used by Henry is not conducive to adding a round in a dangerous situation.
In a leveraction rifle application the Hornady 325GR. FTX bullet is the most ballistically efficient bullet you could use.
Not a recipe for a flat shooting hunting cartridge.
The . 45/70 cartridge is an old favorite. It can shoot extremely long range!!! However, it has a trajectory like a rainbow!
With loads for a leveraction rifle, your ballistic advantage would be NIL! Flat nosed bullets or the aforementioned Hornady FTX will still limit your extended range on game.
I do like the idea of a scope on a rifle, but there are better matched combinations. With one exception. That is the Nightforce compact 1-4X24.
But there is not a reticle available that is practical for the . 45/70.
http://nightforceoptics.com/1-4x24-nxs-riflescope/
IMHO, again, way to much optic for a shoulder fired howitzer:-laf!
Leupold has their VX-R and HOG series does have more practical reticle selections for your application.
I've spent alot of trigger time with a . 45/70 in various configurations. It is a game killer and a fun rifle to shoot. It can be cheap to shoot and capable of killing an elephant! However, the iron that is chambered for this round will determine your level of satisfaction! Choose wisely, my friend!
GregH