push button swap to b&m auto shifter?

Well to be honest, im not sure what tranny is actually in the car. I just kinda assumed that it was a newer 66+ trans with the older push button rigged up to it, but now that im thinking about it, i dont know... so i suppose i could use some help to identify what tranny i have. any ideas? also, i havent purchased the b&m shifter i want to install yet as i havent quite figured out if it will work but the unit ive been lookinh at claims to be compatible with the 66+ style. thanx for any info you can give me about identifying the tranny. you guys are a big help.