i put a jdm d15b in my civic last summer, swapped to obd1 and what not. i am wondering if a d15z1 would be a simple swap, just plug and play i mean. i want better gas milage cause i comute 100 miles a day for school. can someone help me out on letting me know what would need to be done for the swap? if it is already swapped with a jdm d15b7?