Hello, i have a question, how hard it is to swap d16y7 to a 4gen with d13b1, what should i look for?

 

Im not too familiar with the d13b1 but if should be fairly straight forward. Just swap over your old intake manifold and exhaust manifold over to the new engine. Reuse your alternator and distributor as well as ECU from the d13. You’ll have to wire up the fan switch from the back of the block on the old motor to the thermostat location on the new motor.