What's your beef with the 90s? I know they have a high ramp rate but other than that they seem pretty solid.
They are not a heavy enough spring for the xp. You can run them, but it's not that beneficial. I ran them for awhile, but picked up quite a bit of power by switching to 130's.
2001 GTP Drag Car - XPZ, Tischler heads, Upsidedown M90 IC'd, e85, Gen V, 2.3 w/ 5%OD
2005 F350 6.0 - studded, deleted, tuned
2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold