IF they are handy, its worth a try to see.
Cheapest alternative from that,apart from the (unsafe imho)heating and cutting coils....is getting 1 ton Bvan lower controls arms with the deeper spring pockets.
I have a set of them I pulled off an '84 D100 with the slant. And i may have to try that too because those vans never get touched in my area. I'm trying to get a total of 2" lower on all 4 corners of my truck without breaking the bank