well, my buddy had an 87 300zx, and he wrecked it. we looked for a suitable donor body, but couldnt find one under 1500. so we looked into other cars to put his motor in. well my roomie had this 87 rx7 sitting with a bad rotory (geeeeee I wonder what happend) well he onyl wanted 450 for the car, so then we looked into seeing how it would mount up etc. found a mount kit for 600, so we weighed the options, and then bought everything the rx7 is a lighter chasis then the 300, the stock 300 na motor is more power then the stock NA rotory, and if we turbo it then it gets even better. so its a win win win win, situation.