I typed up a big long reply and then pushed post reply and it told me I had to log in, again, so I did...then it says security error and trashed the entire post....
Lost the desire to do it all over, here's the short....To an extent, yes we are trying to keep some vacuum and the o lap in near 56-60 for example, so wider side we stay to a point. but if max torque is more so desired you can narrow the lobe center and not raise the over lap if you lower the duration, lift follows because it's all a balance act .. so 106 and 108, they could work at like 260's duration and lesser lift and not increase o lap and hurt idle, but it'll look small on paper. Lol
I think the 268, previously mentioned by someone else, is too small for the head potential...but OP acknowledges he has to sacrifice potential for drivablilty.