Remington 512 scope mount

I've got an old Remington 512 tube fed, bolt action, .22 that I want to put a scope on. The owners manual, online, says the receiver is grooved. Well, mine is not. My question is: should I look into having dovetail grooves machined into the receiver or having 4 holes drilled and tapped into the receiver for 2 - 2 holed weaver bases? Approx. how much would I be looking to spend for each option? As always, any input is appreciated.

Thanks, RC. I'll call around.

Never thought of that. If I can't find a gunsmith with a price I can live with, I might try that.