i've done a similar swap for a guy who blew his motor and just needed to swap in a motor to drive. Its pretty easy actually with no headaches. Just use your distributor and fuel injectors. You'll either have to run a longer wire to the Y7's coolant temp sensor or take the one out of your HF block and put it in the Y7 block. For performance purposes you can just use the Y7's intake manifold, exhaust manifold and just plug the map sensor into the one on top of the Y7 throttle body(if thats where it is on your Y7). It isn't a lot of work and the motor will bolt up right to your HF tranny. For the most performance you might wanna find an A6 (88-91 Civic/CRX Si) tranny and ecu. They can be picked up for under 200 dollars and are recommended for the most performane. Going from 67 horsepower to 106 horsepower is 40 more horsepower than you have and would be a good cheap upgrade without a lot of hassle.