It all depends on the year.
The forged style is an earlier design then the stamped steel.
I believe the change was in 1949 when the exhaust manifold changed from dumping straight down to angled back.
That change was due to the steering component change in the new design starting in 1949 passenger cars.
Last edited by Pre '68 Dave; 12/23/2025 5:21 PM. Reason: Added information
