Trying to identify 59A style aluminum heads
 

I have a pair of early 24 stud aluminum heads. They both have the number
81 6050 49 on them. There is a small circle with a C in the middle on the top right and the number 140 on the top left. Any ideas what these were on?

Re: Trying to identify 59A style aluminum heads
 

81 denotes 1938...these fit the first of the 24 stud blocks. In order to fit them to the post war blocks [with the relocated valve positions] you'll need to clearance the eyebrows in the heads.

Re: Trying to identify 59A style aluminum heads
 

https://www.fordbarn.com/forum/attac...p;d=1630553860

https://www.fordbarn.com/forum/attac...;d=1630553860"
1938 Ford V8 24 Stud Heads.

Re: Trying to identify 59A style aluminum heads
 

The other difference is the temp gauge fitting...originally these had the capillary style gauge, the heads are tapped 5/8 NF to suit. The later [59A] style heads used electric temp gauge; they are tapped 3/8 pipe thread for the senders.