My 57 pickup weighted in at about 3245 lbs. and the rear axle weight was about 1200 lbs.
But I never weighted just the front axle, but it must be about 2000 Lbs. My truck has a SBC 350 w. a 350 turbo trans it has the full stock frame with Fatman Fabracations Mustang II front end w/tubular A arms , and no other goodies added to increase the weight.
I would say your weight to be 1900# / 2000# depending on the weight of the sub frame and engine trans combo your installing.
Can you put it all together and weigh it before you buy the coilovers then swap springs?