Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars. |
|
|||||||
| Register | Album Gallery | Thread Gallery | FAQ | Community | Calendar | Become a Paid Member | Today's Posts | Search |
|
|
Thread Tools | Display Modes |
|
#5
12-26-2018, 10:13 PM
|
|||
|
|||
There are two '291 head castings. The small block is 3917291 and a big block 3964291.
Not sure if your COPO engine would use the 3964291 or 3919840. - Warren 
|
|
|
Threaded Mode