difference between nailhead 322 and 364 ore 401

How moutch schall i do to get a 364 om a 56 dynaflow 322 orgiginal engiene)

 

And 401.. And what the diffrence

 

57-66 engines are a different bellhousing bolt pattern from 1956 and older. Doesn't work.

 

They, 322-364 transmissions don't interchange. The later 364 and up bellhousings are much larger. Further reading:



He would know:
http://www.charlietranny.com/Dynaflow.htm

More info:

http://www.teambuick.com/forums/forumdisplay.php?76-Nailhead-264-322-364-401-425

http://www.teambuick.com/reference/index.php

http://www.teambuick.com/reference/library/57_chassis/

 

You'd be best to get a 1964 to 1966 401 with the St400 transmission. Put them in as a unit and convert to an open style driveshaft. Converting to open driveshaft usually means a different rear end. The ST400 is much stronger/smoother than the dynaflow and it gets much better gas mileage. If the ST400 needs a rebuild, you can easily get parts since it is internally the same as a TH400.