help needed

thanks for the comment
i have donor 75 dart with all the front suspension
i just think to take it all the front from the 75 and put it in my 71
A few things you have to keep in mind. The 75 could be a large bolt pattern car whereas your 71 is probably a small bolt pattern car. If you do not want to change from the rims/tires you are using now I would recommend only using the K frame. BUT - if the 75 is a disc brake car this would be a good time to swap over to the later disc brakes. And make sure to get all the disc brake related hardware from the 75 - prop valve, etc. Make sure you also swap in the 75 rear end too so the bolt pattern matches all the way around the car and the v8 radiator.
The 71 K uses the rubber biscuit type of motor mount - the 75 uses the spool mount. The mounts are very different and have to be used with the correct K frame. Make sure you get the correct v8 spool mounts to put the 318 in the car. Also, you have to change more than the trans tailhousing - you'd have to change the output shaft too. Some guys have used the longer tailshaft housing trans but had to make an adapter for the shifter mechanism. And you will have to cut/shorten the driveshaft for the longer tailhousing.
See this link here...
B/E body four-speed in an A-body