Is this the correct book for small blocks?

Dale Davies said
Another thought, can an LA cam be used in a Magnum. The LA blocks were all machined with the same lifter bore angles used in the A Polysphere blocks. The A lifter bores were spread to accomodate the pushrod angle for the Polysphere rockers. When Mopar engineered the LA with wedge heads, they did not correct the lifter angle. This requires the cam be ground with the lobes for the left and right banks be ground at a different angle than the B engines or the SBC and SBF.

In short, a Poly cam, an LA cam & a Magnum cam cam all be swapped and lift and rotate the lifters, no problem. Let’s move away from the poly for obvious reasons of the valve layout of EIEIEIEIE

You can swap a LA cam into a Magnum and a Magnum into a LA. Lifter issues need to be addressed for the roller into a non roller abled block. I am currently using left over LA parts in which this is a Hyd cam into a 5.9. Use appropriate lifters and pushrod length and style. (Hollow)

Dale Davies said
It is my understanding that when they engineered the Magnum, Chrysler corrected that "error" in lifter bore angles.

Dale Davies said
Swapping a cam between a LA and Magnum would create a situation with the valves on one side opening and closing early while the other side would open and close late.

No

Lifter bore angles are corrected on 48* race blocks.

:thumbsup: