Aluminum Flatty heads Are these any good?? Pics

Apparently the previous owner of my newly aquired 35 Ford was in the process of replacing the cast iron heads. There were these two sets of heads with the car. One set looks like they were just pulled off of an engine. The other set looks like they were cleaned and decked but there is still some corrosion around the water ports on one head. The owner also mentioned that the car would tend to run hot and overheat when driven on long trips and for some reason he thought it was maybe head related.

So now I've got these sets of heads and I'm wondering, since he already took off the carb, waterpump, generator and everything else and was just about ready to pull the heads.......

Should I put the restored set of aluminum heads on? Should I just bolt it back together and run it? It turns over real easy so there is no problem with the engine inside as far as it being stuck. So, swap these heads or not?? Oh, and are these heads any good??

 

What I can see is that the clean heads are early flat top and the crusty heads are off a dome piston engine they won't interchange , the pistons will hit

 

Both sets of those heads were in a box in the back seat of the car when I bought it. The car still has the old iron heads on it now.

 

It looks like both pairs are for the older 21 stud engine and were original stuff. Are they finned? Do they have parts numbers on them like the cast iron ones that are on the engine? If you can't answer yes to the finned question then they are just so much weight in the back seat. Sorry
The heating problem is possibly from 70 years worth of rust and **** in the bottom of the block. One of the major reasons flatheads run hot is because they are half full of something besides water.
Good luck! Flatheads can be well worth the hastle. I love'em. Dools

 

No fins, they look just like the cast iron ones. Part number is like 40- 6049-A2R

 

The head story for '35-6 is complicated; all is sorted out in the book in one of your pics, the '35-6 resto book. 2 kinds of piston, many heads. Your car would I think have had aluminum heads originally, replaced by iron as they corroded. The prefixes and suffixes of the 6049/6050 number tell what version each is.