cross member question

[ninetoestroy]

so looks like i might finally get started on my 64 c10, i have a cross member from a 77 c10, i want to lower it (raise) the cross member. just looking at it, seems i can do it 3 different ways, (1) "section" the whole cross member (2) "notch" just the part for the frame (3) take 1.5 inches out of the frame and box the frame there. Question is which one is "best". seems to me the 1.5" out of the frame would be the easiest and just take 1.5" out of the motor mounts also. thank u guys for any input and i have already learned so much from reading the post on here.