318 Cylinder Heads

Also, when use on a LA block, you have to stop for a second and do some math. Heres why;
The earlier LA engines use a rocker ratio of 1.5 VS. the Magnums 1.6.
That cam with lets say...480 lift with the 1.5 rockers are now .512 with the Magnums 1.6 rockers.
Do the math like this;
Cam lift divided by rocker ratio X's new rocker ratio, or
.480/ 1.5 = .32 X 1.6 = .512
.500/ 1.5 = .333333X 1.6 = .533333
.525/ 1.5 = .35 X 1.6 = .560

You'll need to make sure the springs work with the new larger lift.
This new rocker ratio also helps intensify the cam. The valves open a little quicker (and higher) for the same duration.