yeah, the late 80's integra motors bolt right in...
this is directly from the hybird page:
"The 1st gen Integra motor pretty much bolts right in. You only need to modify one motor mount and it is a rather simple mod. And while getting the Integra engine, get the rear suspension, including the sway bar and disks. They all bolt on. If you have an Si, you can use the stock Si ecu or use the Integra ecu. The Integra ecu has a higher redline and a better fuel mixture, but the stock Si ecu works fine too. If you have a carbureted car using the Integra (or Si) ecu will be a pain in the ass. The fuel system in a carbureted car is not up to the task of supplying the EFI system, so everything from the gas tank forward needs to be upgraded. For the time and money required, you should think hard about an aftermarket computer like a Tech-II, DFI, or Motec. The fastest setup would be based on a non-sunroof equipped, formerly carbureted 84-85 Crx with an aftermarket computer controlling the Integra motor."
http://hybrid.honda-perf.org/tech/3gtech.html#Integra%201.6Li would definitely say swap the 86-89 integra motor and use an aftermarket computer to control it. (the 85 hf is carbureted right?). it should give you some decent power, and you'll definitely feel it in that light ass car!
