ok so i got a free rex and i wanna do a engine swap but i wanna keep it single whats the best engine for this, planing on going turbo

 

so your asking what is the best single cam? for you and your car i would have to say d16z6. since you probably dont know what that is it is a single cam vtec motor came out of the 92-95 si and ex. but its obd1. or the jdm d15b witch is almost the exact same thing.