Yup, we (I) talked him out of spending more money on the flip.
The flip system works out great if really nice springs aren't in the budget but even a higher end flip/spring system like the setup on my 'burb (2.5" flip, 6" shackles, 3" TCI 64's) will only stroke 13" or so of vertical travel. A mild custom leaf pack with a tension shackle will run an easy 15" of vertical and I've designed springs that would put out near 20".
This makes bolting in just a spring look pretty good.
All this assumes mild lift heights, generally 6" and down.
Flattening a spring to bolt it in is not uncommon, we have used a jack under some heavy object to flatten them a little, then stick a spreader bar in there to install them. That works well for taking them off once they're on too. My first set of our springs had a 2x4 and a piece of 1" tubing dedicated to the job.
Surely the custom pack makes a huge difference over an off the shelf item, as well.
On another note, Im building a rear suspension for my pickup now. I'm using 3" 64" springs I got from you guys, a 4" flip and 7.25" shackles. Im planning on have a bit more than 13" of travel. Seems the shackle itself has 7.25 of total movement, with the brackets setup correctly.
sounds like a good 50% off item 