I dunno, my engine right now has 200k miles on it and I figure a new b18c would feel smoother and quicker.
One thing that bothers me with the engine in it now is that from stop to going in first gear feels like it has to go over a small hump to get going, in the civic i could just smoothly start rolling and scoot away, but this engine tends to have the smallest gap between stopped and going that it almost forces you to chirp the tires every time I leave an intersection.
I dunno how else to describe it, but If i could find a way to get rid of that problem (its probably more tranny/shifter based than anything, but I honestly wouldn't know lol) I'd just swap the head out, but I'd be learning in the process, and figured the swap would be easier in the long run. The swap isn't a definite thing but its in th plans at the moment, things can always change though

P.S. Is there a -ls/vtec build- or -ls/vtec boosting- guide anyone has handy. (or a link to)