Parts ID help

[buickrcr]

I have these parts that were suppose to come out of a Monte ss 200r4 trans.I looked thru the archive to ID these part but seem to be unable to find numbers for them.I would appreciate your help with IDing them.
The valve body has in ink on it this[KC2]
Cast into the body it has
AB
4203 D9
318
The servo cap has on it
LESTER-3-8635694[87]
Thanks for any and all help.

 

[77 cruiser]

VB looks to be from an Olds.
Servo is from a GN.
http://members.aol.com/powerrslid/thm2004r.html

Jim

 

[chris718]

your right and that kc valve body is a real crapper .they usually ssack shift from 2 rite to third even at hi throttle .russ at gm ,what were you guys thinking?www.ckperformance.comm

 

[buickrcr]

Thanks

The guy I bought it from swears it came from a untouch MONTE SS.Looks like another case of a 200r4 is a 200r4.
I'm looking for something to help the 200r4 behind my 455 BBB.
The trans builder I think hi-jack the pressure somewhere else in the valve body to make this trans shift hard under normal driving condition but shifts badly under WOT.I'm trying to save the trans from destuction before it happens.I know the Trans came out of a B-body 1986 Buick with a small V8 with highway gears.
Just don't know what to do now.

 

[chris718]

why dont you get an ss or gn vbody from us .we have over 200 in stock?www.ckperformance.com