Kevin , I bought this complete GM NOS motor mount kit back in 2008 .

PIC

https://s26.postimg.cc/qktgvsae1/GM_NOS_MOTOR_MOUNT_KIT_3760997_b.jpg

The sleeves as you call them are called SPACERS in the parts manual.

The original part # GM 3705449 superseded to GM # 3769338

Dan's GM Obsolete
Chinook , Montana
phone : 406 - 357 - 2615

Dan's has ( 20 ) GM # 3769338 SPACERS in stock


Locks are available on ebay - GM # 3763763

PIC

https://s26.postimg.cc/55fkxx5dl/Rear_Motor_Mount_Nut_Locks_Second_Design.jpg

George
'54 3600

Last edited by '54 3600; 08/13/2018 5:44 PM. Reason: add

1954 3600
A big help to many on the Bolt
Now cruising in
The Passing Lane