so I just picked up a 65 nl320 bone stock... the truck is in great shape, problem is the stock e1 engine. No power, not freeway friendly, and really not performance friendly... so... the question I had to figure out was what engine would fit in this little truck and give me the performance feel I desire.... a rotary. The problem is I don’t know a lot about them, and not sure as to the correct version to stuff into it. Any suggestions at all would be very appreciated.