I had considered going a tad higher up front, for that 'gasser' nod, but stayed put after some internal 'analysis', lol. Too much height out back, without at least some more up front gets a little too "butt-high" to me, ......plus I'm almost out of headlight adjuster as it is. Much higher and I would have had to convert to different ones.
As it sits, I can clear alota stuff .....stuff that I giggle about when I see lowered car owners sweating speed bumps, and/or uneven pavement at car shows and so forth. I just sail right over, lol
I just went with Moog coils, which iirc where p/n 8000. The application was 390 V8 w/a/c. I could dig through my notes to verify.
6 leaves with coil-over shocks. Yes, some people will curl their lip on the coil-over part, but gotta tell ya the ride is very nice --not a buckboard, etc.
I went with General Spring, but to be honest I'd recommend Eaton for you, because General changed their website some yrs back, and you literally have to call them now, whereas Eaton's site is easy-peasy. More money though....
The front wheels and tires:
Wheel Vintique Magnum 500's ; 15 x 7 ; 3.75" bs; Radial T/A's (now) 215/70rx15's
Wheel Vintique Mag 500s ; 15 x 8 ; 4" bs ; Radial T/A's 275/60r15's
I'll throw in a more current pic or two, to show how well the springs have held up since I did all this in the Fall of 2011.
One thing also to be aware of is that as you go higher in the rear, the more weight transfer you throw back at the fronts. So if it's too high back there, your car will sort of let you know, by seeming to be more "nose-dive-ish" --because you're upsetting the front to rear weight bias. You'll have to compensate for that by either going with a stiffer spring rate up front --or living with a certain rear height.
If you jack up one rear side for example -- the diagonally opposed front side dives down, right ? That's the effect I'm talkin' about.
Hope some of this helps !
ps: I also added the "Donahue bar' onto the front lower c/arms, and went to a 1" stabilizer bar. With those additions, and the springs, wow what a difference in ride quality and road feel.