if you want to get low with a 620 you have to notch the frame....
my axel rides in my notch and this is how low i sit...
before i wasnt even close to this low and my axel was hittin my frame like crazy....
this is me before the bed on.... mono leaf with 3 inch blocks.... you can see how close the axel is to frame if there wasnt a notch...
with bed on my axel rides in the notch....