C4 upgrades?

[Bronco Billy 75]

I have to rebuild my c4. Im not a transmission guy. Wondering what kind of upgrades can I do. I don't want just a stock c4 rebuild but willing to spend the extra $ for a rock solid heavy duty tranny. 75, 351w 300hp? going to increase hp someday to 400+. Thanks

 

[spap]

With the upgrades to the clutches, valve body and torque converter the c4 can easily handle 400 hp

 

[garberz]

Start here, lots of good upgrades. The biggest issue is trying to keep it cool.

http://classicbroncos.com/tech/improving-the-c4-automatic

Mark

 

[mudstud]

Here a thread I started with basically the same question. http://classicbroncos.com/forums/showthread.php?t=221307