[Idratherbeflying]

Hey guys im looking for suggestions. Ive got a 1990 honda civic wagon dx automatic im considering doing a manual trans swap and a diesel engine swap on a seriously low budget. Im wanting to use some kind of industrial engine air or liquid cooled and between 25-30 hp. What honda trans would you recommend and what engine do you think would be best. Right now this project is in the thinking stage and i want as many opinions as i can get. My goal is to be able to cruise at 55-65 and not lose to much speed on hills and still be able to carry a little extra weight. Thanks in advance