There in lies the problem with this combination. I'm rather sure the LS automatic could handle the extra hp, but it won't rev to 8000 rpm (if you use the LS ECU) and you won't have any stock VTEC fuel maps. Everytime a thread like this pops up someone always has to chime in that there is a magical DOHC VTEC engine they sell in Japan (I think a B18C1 but sometimes the story is a B16A) but I'm pretty well convinced it's just a figment of somebody imagination (it probably exists, but I've never seen for sale or installed in a car). Honestly, if you want VTEC, your either converting to a manual or selling your car and buying a manual version.