Try a set of Andrews 54s. Then see how it likes 3500 rpm.
Andrews 57H cams would likely be even better than the 54Hs, now that they are available (wish they had been when I got the 54Hs...), and Cometic MLS .030" head gaskets will help them by increasing the squish without doing crazy stuff. The duration of the 54H and 57H cams is still in the mid-RPM power range (236 to 240), and the valve timing will help keep the engine cooler than the SE 255 cams - plus provide a
lot more power in the mid-to-high RPM range for passing... and "stuff"...
I've been reading good stuff about the 57Hs, and I talked with Andrews for awhile last week about them. They told me they designed the 57H from the ground up with a wider lobe to increase the dwell, and they seem to perform very well in the 110" engine, even though they weren't really designed specifically for the 110. I suspect they
might be a tad noisier than the 54Hs tho... I don't know... but with a wider lobe tip, I would think that the ramps would
have to be steeper than the 54H ramps.