727

[Mark Benson]

I have a 1973 400 big block w/ a bb727 and wanted to know if the parts will interchange with a 1978 360 small block w/ a sb727?

 

[66dartman]

The case will be different, and there may be some internal differences especilally with valve body. The 78 may or may not be a lockup, probobly not but you never know. Lockup trans have different valve bodies and the input shaft is different as well as other differences. Drums, clutches, bands etc should interchange.

 

[Mark Benson]

They are both non-lock up tranny's.

 

[66dartman]

Are there broken parts in the big block trans? If all it needs is a rebuild, I would just buy a kit with clutches & bands and just rebuild what you have. If you teardown one to install parts in another, you will at the very least need a seal kit.

 

[Mark Benson]

No broken parts. I reckon i'll just buy a rebuild kit for it. Thanks for the info.