1963 Avanti automatic driveshaft, same as a Lark?

[Canuck E]

Hi all. Looking for some help in getting a driveshaft. Will a Lark V8 automatic drive shaft work in a 63 Avanti? Any other ideas on what would work? Thanks in advance!

[A0136]

Canuck E

Yes and no.  The earlier Larks and later Larks have slightly different lengths. Later Larks (Crusier) had a longer wheelbase and longer driveshaft. Larks also used 2 different u-joint types (spicer and mechanics) so the drivelines can be the same length but not be the same.  
The 63 Avanti with automatic (powershift) uses a driveline that measures 46 9/32”  center to center of the u-joint holes. The Avanti driveline used spicer u-joints.

So some 62,63 and 64 Larks with automatic’s use a 46 9/32 length driveline. If one of those has the spicer u-joints it would fit. I don’t know if the tube size and thickness is the same or different. 
A driveline from a 3 speed OD car or longer wheelbase with spicer u-joints could be shortened and have the yoke changed. 
Steve