AR Turntable ToneArm

I would like to know which arms can be the drop in replacement for the latest (1984) AR original arm. Thanks.
I have a Linn Basik Plus arm on mine.
I made a new board and dropped in a RB-300.
I no longer have that table, but I used a Rega RB 300 when I did and it was excellent
Dogeatpuppy, where did you find the new arm board and get it drilled? Thank you for all your feedback.
Tinman, my '84 AR had a Linn Basik LVX.

It would be worth getting a new armbarod drilled for something like a Rega, I agree.
Ditto Linn Basik.