James’ 1974 W200 build

Diaphragm. There is no over center spring on these clutch pedals. I don’t think trucks have them?

this clutch kit
McLeod Racing 75208 McLeod Super StreetPro Clutch Kits | Summit Racing

It's not supposed to have one with the diaphragm clutch anyway. You 100% sure it doesn't have one?