W2 heads

The lifter bank angle in the block is 48 degrees... stock is 59. The 48 degree deal takes some of the wonky pushrod angle out of the equation.

40 years ago the Cup teams would cut the lifter bores out of the 59 degree blocks and weld them back in at 48 degrees to straighten the pushrods. Mopar finally took a hint and developed the 48 degree blocks.