Looking for 360 advice on a budget.

hi guys been reading this thread with interest as it mirrors my build,
with my 69cc heads my measured commpresion worked out in the region of 7.66-1 ordered some 30 over kb107s and should end up around 9.2-1,
just a newbie question but if i get my motor balanced does that mean i can run my original 904 box without having to get a balanced converter or flex plate

This is thread hi-jacking. This is a question worth it's own thread.

Your KB-107's should get you 9.8-1 if there zero deck height.
When you get the assembley balanced it will be your choice of ether internal or external.
A 360 is factory balanced externally and if done so, you can reuse the 360 converter and what ever tranny with the proper OE flex plate.

If you have it internally balanced, you can run a neutral balance converter with the proper OE of otherwise flexplate. And with every trans you want.

Your post is questionable since you give no real details.

Your OE box is a 904 that was connected to what? You changed engines?
Start a thread.