'68 318 to carbed Magnum 5.2: Check my checklist

TX - a friend of mine who has used the B&M 10239 pointed out that the B&M unit does everything well EXCEPT flex; it's too stiff for its own good. Any comments on that? Curious what your opinion would be. Haven't seen any such criticism mentioned about B&M plates until now.

One thing did come to mind - some Googling seems to suggest the factory 1996+ Magnum 5.9 flexplate is weighted. Would it be possible to use one of those on the LA 360 / 904 combo instead of the B&M unit? Or is the factory bolt pattern on the Mag 5.9 flexplate incompatible with the 904?

EDIT: Answered my own question, won't work. 122t / 904 vs 130t / 727, thus different bolt patterns.

Hell with it, B&M 10239 flexplate it is.

-Kurt