Changing Springfield sights

Can these sights be changed to adjustable using the original rear dovetail ? If yes, does the front need to go as well ?

Yes and yes.

Thanks fellas.

I am picking up on this thread since I am in the same boat.  What front sight height would work with this rear?  

I fit one on my Mil Spec and at 25 yards it groups a 'little' low.  Sight all the way up, holding at 6 o'clock.

Measure your front sight then go get one lower by say .020 -  .030

Thanks

Yeah..

Correcting Sight Height
If your rifle or pistol is shooting high or low, there is a formula you can use to determine what the correct height for your sight should be.

Terms
Amount of Error: Measure in inches the distance from the bullseye to your shot.
Sight Radius: Distance in inches from the front sight to the rear sight. *
Distance to Target: The distance in inches from your shooting position to the target.

Note: Be sure that your rear sight is at its mid-point before you shoot.

Formula

Amount of Error X Sight Radius	= Sight Correction Needed
Distance to Target

If you are shooting low, you would replace your front sight with a lower sight, and conversely, if you were shooting high, then you would replace your front sight with a higher sight. Add or subtract the number of thousandths needed to the actual height of your sight and you will have the correct height of the replacement sight.

Example
At 100 yards, your shot is 6" low and the distance between your front and rear sight is 19.5".

6 X 19.5	= .0325
3600

Since you are shooting low, you would need to lower your front sight by .032".