I am very hapy to report tonight that it looks like I have found the original Saginaw 4 speed for my car. Two owners back before me still had it stashed away in his storage container. He swears it is the original one from when he had the car. A hefty 500.00 would probably confirm that alone. He know knows what I'm doing, trying to put it back to original. I gave him half down to hold it until the end of the week when I can pay him the rest. It looks like a 4 speed Saginaw and the numbers just under the side cover are R7T27. I'll post the pictures at the end of the week when I get it.
Thanks Stillwatwer, I'll study up on that link you provided.
That's great that it may be the original, Jeff, but make absolutely certain before you pay that King's ransom for it. I love it when people take advantage of you when they know they have something you want. For that price, I suggest getting all the numbers off the pad and any casting numbers and post them here first to have the CRG guys verify it as the original. .....If it isn't the original it's worth $100 around here.
I was at a big swap meet yesterday and could've bought 6 Muncie's for LESS than that. It seems the old 4 speeds are dropping in price with many people opting for 5-6 speeds now.
Good luck with the quest on the transmission. You're very lucky to even be able to trace the history back that far. I can't get the last owner of mine to answer my letters for history.