Freaking coolant leak!

I just washed my Dart getting ready for the Friday night car show I was going to with a customer who has a 68 Stingray. I pulled into the garage and saw a line of drops leading into the garage. Thin, fairly clear, but didn't smell like coolant. I forgot about it until last night I pulled out and saw the drips again. It was dripping off the transmission. There was a puddle of coolant in the garage. I can't tell the source yet, but I'm hoping intake. I can see it wet below the intake and running down the bell housing. I'll get the mirror out tonight and check. Hopefully not a head gasket or a frost plug. I know there are to coolant ports at the rear of the intake that are blocked with no flow through, so I am hoping that's all it is.