I am building my old 4.0 to a stoker 4.6. I have everything but valve springs, i can't use the stock ones is what my comp cam's spec sheet says. I bought a kit with a timing up grade kit, cam, and all the valve spring goodys. Turns out the valve springs won't work there to big and thats the only Jeep 4.o set they make so i sent them back. And have no idea where to look to find a set for her.