64 instrument cluster swap into a 65 barracuda harness question

I really just don't know. Some panels have a single turn indicator like ( <-> ) where others have 2 separate indicators. I'm not sure how they wired the 1 bulb to flash with both left and right. I can't look at the boards alone and determine what bulb is for what, even if I could clearly see the copper traces on that 64 board. I would atleast need to see the fronts/bezels.
Only one I know inside and out is the 2nd gen' rallye panel. I have a complete 65 panel on hand but not a 64 :(
Bottom line, I couldn't finger it all out from here.
I really just don't know. Some panels have a single turn indicator like ( <-> ) where others have 2 separate indicators. I'm not sure how they wired the 1 bulb to flash with both left and right. I can't look at the boards alone and determine what bulb is for what, even if I could clearly see the copper traces on that 64 board. I would atleast need to see the fronts/bezels.
Only one I know inside and out is the 2nd gen' rallye panel. I have a complete 65 panel on hand but not a 64 :(
Bottom line, I couldn't finger it all out from here.

I took off the cover, it is the same there is a single indicator for the turn signal in the center of the instrument cluster. There are two pins for both boards. I am confident that the turn signal will not be an issue. I was thinking I can ohm out the leads from the connector plug and trace them using schematics from my manual. Color codes are visible and I even have a spare harness to use as well. I can trace those things in order to check points at the block on the firewall as well.
Thanks for your insight, I will do more research on my end.