With a 1500 truck, you’re going to have to find another truck style diff.
‘91-99 Suburban/Tahoe or ‘88-99ish pickups. I say ‘99ish pickups because there are a few early ‘99’s that have the same body style.
Now, you will likely have to some cutting and welding to exactly match the frame mounts on the ‘95 if you switch weight classes. The three classes of frames have different hardware so make sure to take lots of pictures.
The other thing is each class of frame will have different brake hardware, different brake sizes, and different wheel configurations.
Pickups have 5 bolt wheels like yours. 2500’s will have either 6 or 8 depending on the rating. There is the full on 2500 three-quarter ton that is eight bolt semi floating rear axle.But then there is the 2500 LD that only comes with a 6 bolt.
The 3500 comes 8 bolt only with the full floating axle.
Be very careful selecting anything larger than 1500 class to swap because you’ll have to upgrade your braking system to match what you put in.
It all depends on what you’re looking to do. What’s your current ratio?
A 3.73 is a very good ratio.