518 and a 360 (408 Blueprint engines stroker)

I have come to learn my Frankenstein cuda has a 518 transmission in it. The crate motor from Blueprint shows the weighted balancer and to use a weighted flexplate (pre-magnum B&M 10239) and a neutral balance converter. The converter in the transmission now does have a weight welded on. Is it as easy as taking the weight off and using it. Looking for some info from those that have done this.
The A518 (46RH) is a 727 derivative, and should use B&M 10236, if I am not mistaken. The B&M 10239 is for A904 and A500 (42RH).
@Johnny Mac should clear it up for you.