I love my PA Super Comp..... I ran a streetfighter converter befor I changed to an Edge with the PA trans. I still have the TCI converter if interested.
The holding force of the servo is the activation pressure times the area of the holding piston. No other factors (like rerouting) will change the pressure. Modifying the valve body can change the speed that it applies but once it is applied the holding pressure is always the same with the same operating pressure. On the C4 you have an apply side and a release side and they are different (unless you modify the servo). Some of the servos would apply real fast but you would need more pressure than the transmission would allow (without extensive mods that could cause breakage) to get them to hold even a modestly built 302. There are different thoughts about which is best and the reasons behind that thought. I try to match the servo to the HP. I don't have people complaining that my trannys don't hold or hold up. If I did have a problem I would fix it fast. That is why I keep records on all my buildups from the tear down to the final assembly.
I have never had a problem with any of the servos holding, Its always been the release or lack thereof that causes problems, Its the release side that causes the flair when going to high gear.
That flare is caused by the servo releasing before the direct clutches grab. The cause is the apply side of the servo and clutch circuits. When you remove the servos restriction on the apply side and don't remove the restriction from the release side and when you forget to remove the restriction on the apply side of the direct clutches you have a tranny that will snap your neck on the 1-2 shift and go into neutral on the 2-3 shift. You can't just hog out a couple of passages in a valve body and expect it to work with all combinations. You have to change the passages in proportion to each other and there are a total of between 2 and five passages that need attention for some of the combinations of servos and clutches. Did you know that adding clutches makes your tranny shift smoother (no neck snapping there) but hold more torque? The cure for the Pinto C4 was to go to a three clutch set up when customers complained about harsh shifting with the two clutch stock pack.
