about to put front end together need spring drop advise

[71Chevystepside]

Here my frame off project that I am working on right now,
71 C10, 454 BB /400trans, 2wd stepside

Here is my general goal to try first Drop rear 5 inch and front 3 1/2 to 4 with maintaining a comfortable, nice ride down the road

For the rear I now have put a set if 5 in drop coils

For the front I have 2 1/2 drop spindles and this is my question??????

To achieve my general goal which would work better, I have a stock set of BB coils from a 3/4 ton and I also have a stock set C10 coils from a 6cyl
What set would work best for my achieving another 1 to 1 1/2 inch drop on the front,
I am willing to cut a ful coil off but wanted to know first which would work best first before I prep and paint to put back together, any infor that would help would be appreciated..........

Thanks,
Rich