Late EL Falcons were released with a Hybrid AU head, which along with revised porting and valve sizes, has a different rocker ratio & valve stem diameter.
You can run an EA-EL camshaft on a Hybrid or AU head only if you change rocker gear to the E-Series ratio. Valve retainers must be the correct size for the stem. Valve springs are cross-compatible.
How to tell if you have an EL Hybrid head?
Check the casting number on the front left of your cylinder head:
- WR2A is AU casting (7mm valve)
- 96AA/96DT is EL Hybrid AU casting (7mm valve)
- 95AA/95DT or earlier is a regular EA-EL casting (8.7mm / 11/32″ valve)
See our range of camshafts to suit the EA-AU Falcon SOHC 4L 6 Cylinder.
Image courtesy of Fordmods.