Here's what I do:
I like my fries on the thin side. I've never even tried to do thick ones. I cut my fries in about 1/4" strips. If you want yours larger just experiment with a few at the beginning on cooking time.
Heat Crisco shortening to 365° F in a saucepan. (make sure your saucepan is large enough to give you some room for boiling oil once the fries are put in and less chance of burning yourself). Cook 2-3 cups of potato strips at one time, adding slowly. Cook until potatoes are tender and lightly browned, about 10-15 minutes (for thin fries it might not even take 10 minutes). Drain potatoes on paper towel well.
While frying remaining potatoes, keep fried ones warm in oven set at low temperature. Salt or season as desired.
(I still like my wok best to fry things in).
"Count yourself...you ain't so many" - quote from Buck's Daddy