You will never ger enough wift to clear them with a stock suspension. If it will fit under the hood, you might be able to do it with a toyota clip. IMO 22's are way too big for a 620, 20's almost look too big.
Heres my 521 as
reference:Laid outMax lift
You must remember im only running an 18. If you run 22 with the stock suspension, your upper bag plate would be almost hitting the upper arm laid out. The upper bag plate is the limiting factor in the datsun suspension, as is the bag hitting the kingpin (or if you truck is a disk brake truck the spindle)