Updating early 904 - is this a suitable donor?

Not all the 998s and 999s had the 5 disc direct drum. Some had 4. there's a seller on FeeBay that sells 5 disc direct drums LOADED with NEW clutches for 20 bucks and 12 bucks shippin. Just search 904 or 500 direct drum and it should come up. the A500 5 disc direct drum will interchange....in fact, you can almost dump the A518 guts into a 904.....almost. But not quite. lol The 5 disc direct drum is great insurance.

EDIT: I looked but could not find that FeeBay seller now. BUT, you can go here and get a reman SIX disc direct drum loaded for like 63 bucks.

https://www.wittrans.com/SchematicParts.aspx?Transmission=A500&LinkCode=555