I don't think its the Magnefine anymore. Ford discontinued using them due to leaks and a ineffective bypass, IIRC.
Well, I guess that was official Ford, but Motorcraft could be anything since its aftermarket.
+1 on the J-Mod. I recommend installing a few Sonnax valves and a Superior " Super Tuff Plate" K092 separator plate at the same time.
I have a done a few transmissions with this plate and the Sonnax Valves along with drilling separator holes. Cleanest shift you'll ever see.
Sonnax
76948-09 $15
76948-29k $30
76948-02k $20
Superior
K092 $40
Ford
1W7Z-7D100-AB $2
1L3Z-7C155-AA $2
Hole #1 (Intermediate clutch feed post Accumulator) #20
Hole #2 (Intermediate clutch feed pre Accumulator): 7/64
Hole #3 (Intermediate clutch exhaust) #15
Hole #4 & #5 (Direct clutch feed): #33
Hole #6 (Direct clutch exhaust): #20
Hole #7 (Reverse servo feed for Manual 1st): #43
Hole #10 (Reverse feed): #43
Hole #9 & #11 (Forward clutch feed): 1/8