For most street driving the super ram would be good but if you plan on kicking azz on the LS1 in a C-5 you will need a lot of mods to your old L98.

I have not driven a naturally aspirated 350 with a miniram so have no first hand experience but on my supercharged 406 with a miniram I can hit the throttle at 900 rpm with the clutch fully engaged and break the 315 kd's loose. Personally I think the miniram is much better on the low end that what i keep reading on all the forums. A 350 with a large cam will be soft on the low end anyway so for street superram may be better but miniram will kick ass on the superram at the track