Looking for 94-up LS

hey figured i'd introduce myself currently i own a 240sx but have chosen to get rid of it after its short 4 month stay with me. I'm going to go with an integra LS and throw the b16 head on there and then from there just work it to the balls and make it all motor. any suggestions information i should know? also i heard when you do the lsvtec you need new pistons is this true? thanks for the help