Remington 510 targetmaster scope mounting?

[Trigcure]

I hope i got this in the right forum, but a few years ago i got a Remington model 510 Targetmaster .22, i have fallen in love with this little rifle, and am making a custom thumbhole stock for it, i would however really love a scope. I heard somewhere that someone removed there rear iron sight and put the mount there, i would just like to know is this possible? or do i have to get this thing drilled and tapped for a new mount? and if so, how much does that normally cost? I don't know the exact diameter/depth of the screws, but they are just about six tenths of an inch apart..
PS: It looks the same as this, just a little less rusty. http://forum.gon.com/showthread.php?t=320832

Thanks for reading!

 

[Kiah]

Can't see the pic. I think d&t is your only real option on the 510. Check your local gunsmiths for a price or do it yourself. It's an easy job if you can keep everything straight.