Need Help Identifying engine/trans combo

Hello there. I am in the process of buying an 351C 4V with 2 barrel heads. The owner had the engine rebuilt 8 years ago and never had a chance to fire it up, it is on a stand in his garage for the past 8 years. He doesn't know much about it but I can tell you it looks brand new aside from the layer of dust. he said it was from his old 69 mach 1 and he has the tranny that matches up with the engine, also rebuilt and looks new (on the top of the bellhousing was stamped 23). He also is giving me a nice pair of headers that had New Mexico ingraved next to the collector. Everything is there 4 barrel carb, power steering pump, belts, hoses, oil filter, distributor, altenator. My question is where do i find the engine code and trans code to figure out what it really is? Thanks for any advice or info. BTW I'm buying it for $800, engine/tranny/headers. He has two aircleaners ones chrome and the other is factory ford blue. both say 351 4V. Thanks again!

yes its def a cleveland, i know that it didn't come in the 69, and that it was intro'd in 70. I would like to know if the 351-4V, came with 4 barrel heads only or did they also come with 2 barrel heads and just a 4 barrel carb? On the bottom rear of the block the numbers were 2E12 and next to that was
D2 AE CA The trans is an auto, my guess is a C 6, it has the number 23 stamped on the top of the bellhousing and on the bottom near the pan. Also on the side of the tranny is stamped A9. there is a serial number 1H188504, if that helps at all. Anyone have an idea or can be of help thanks.

I know for sure they're 2 barrel heads, that was the first thing i checked when i saw the motor. The air cleaner said 351 4V but it had 2V heads, so i wanted to know if it originally came as a 2V and was converted to a 4V carb or is it a 4V that was rebuilt and had 2V heads put on. I know this was a fairly common swap for better street performance. Besides I have an extra set of 4V heads in my garage from a 351 Boss motor I had in a 69 fastback (I should have never sold that one) if I want to put 4V heads on it. Although I wouldn't mind the new edelbrock heads for the clev. Those with a turbo...hmm now where talkin $$$. Anyone know of someone with a turbo 351C. I heard there popular in Austraila making between 600-800 hp. I've done some research on the casting numbers from the block, the 2E12 means it is a 72 block built on May 12. The D2 AE CA from the research I've done I believe means 72-74 4V with 4 bolt mains. can anybody verify if that is correct. Thank you.