I've driven a carb'd 3.0 in an early 914 and it was a blast....plenty of power to get in or out of trouble........a motor bigger than a 3.0 has got to be scary...just 20 minutes ago or so I just layed down 30+ feet of melted rubber from beating on my 3.6 powered 911 and it's a heavy pig compared to a 914
(I had to get it sideways in our large big parking lot to show off to my co-worker whos everyday ride is an early 80's Toyota Corolla, LOL)
So back to your post, I think your 3.0 should be plenty quick, if not, something is wrong with it.
Most people that have 3.2's or bigger in thier 914 have spun the car at least once from what I've heard...they can have "that" much power
