Balance

[Carmack]

I had a71 351w built and the builder didnt put on the build sheet if its internally or externally balanced any engine gurus out there i believe this year make was a 28oz external balance

I need this info to start the tranny build

 

[Fellro]

The internal balance didn't show up until the late 70"s

 

[Carmack]

Ok i figured thank you though am i right on the 28oz part