I had to abandon the 87 Rex shell I was after (no title, liens, standard excuses a la, "Just have the guy come out and he looks at the VIN and they give you a title..." Yeah, sure then why didn't YOU do it? ... "Uhhh? I don't have time?") And the thought of finding an 84-87 HF motor was daunting... But fortunately, as one door closes, another opens, and I have my sights on an '89 DX in good condition (Tucson weather! 350 sunny days a year!) Like the '87, I want to make a HIGH MILEAGE CRX. This means the HF engine, the HF tranny and perhaps some mods (if they can be done) to the computer or what have you to maximize efficiency and minimize power... which probably sounds like heresy from what I read in the other messages. For the life of me, I can't figure out why more people aren't going this route! $40,000 for a Prius that gets 50 mpg? NUTZ! I imagine that many of the readers here have experience ripping out HF engines to stick in the D20's or B16s or what have you... Has anyone done the reverse? Or can anyone recall working on an HF? Will I need new motor mounts? A new radiator? New... stuff? What needs to be replaced and what can stay in a DX to HF transition? Will I need to get HF wheels? (They're smaller). Any help for this would-be Grandma Driver?