to get the most out of the 2.6 you need duration, not lift, as the heads are lift limited due to the design
as is the case with most any production head
a lot of people who have tried Schneider cams with wildly varying success. Others have used Oregon Cam grinders. The starquest crowd love the Tim C line of cams, but I don't know if they are still made - screaming banshee, Monster banshee, ultimate banshee, etc
Banshee cams popular because they were born in the SQ community..... more miss than hit tho, especially the rollers where u had to source other crap to run em, for little to no gain
One dude had to pester schnieder to grind his cam properly to the specs on the schnieder supplied card. Reward was an amazing 100hp gain!
The red 800+hp 9sec starquest I posted way back, torque curve shaped like no other 2.6 I've seen. No characteristic tq nosedive
So schnieder can provide a proper cam. Most of the faster 2.6s ran em back in the day. Some ran TEP cams also

I believe consistent quality control is lacking, compounded by 9 out of 10 folks do not bother to degree their cam
One 2.6 guru (5spd 10sec street starquest), says he's even seen oem gears incorrectly marked
Correct valvespring pressure is essential, and another topic