The front spring is stock. With the shackle reversal you gain about an 1 1/2" using a stock shackle. The rear shackle is 3 1/4" over stock which would also give you about 1 1/2" lift on it's own.
Typically if you are going to run stock springs with a shackle reversal I'd use a stock shackle or not more than 3/4" over up front. Match the rear with a 2~2 1/2 lift spring and a more modest shackle, maybe 1" over. Generally a lift spring will have a slightly longer main leaf so your shackle will need a little extra length under
compression.
OME matches a slightly longer shackle to their lift spring to get the guesswork out of the equation
Typically if you are going to run stock springs with a shackle reversal I'd use a stock shackle or not more than 3/4" over up front. Match the rear with a 2~2 1/2 lift spring and a more modest shackle, maybe 1" over. Generally a lift spring will have a slightly longer main leaf so your shackle will need a little extra length under
compression.
OME matches a slightly longer shackle to their lift spring to get the guesswork out of the equation