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The Nissan L-Series Head came out on a variety of models ranging from the late 60's through late 80's. During its extensive run there have been a number of iterations and variants made. The table below is not a complete list but is enough information to make an informed decisions in regards to appropriate head use or the basis for calculations.
L6
Notes:
Some omitted items include;
The R30 N47,
The R30 E88E,
The Cedric 2300 block and head,
240C, 260C, and 280C combinations,
And the Patrol combinations.
It is also important to note that the F54 blocks vary in water jacket sizes.
The 280ZX possesses the smallest of the F54 water-jackets, arguably good for overboring but 89mm + results in thin cylinder walls before water-jacket contact.
The 280C Cedric contains F54 jackets of the next size up. These blocks are few and far between due to the limited number of cars containing them.
The Patrol has the largest water-jackets of all F54 blocks perhaps to ensure that the potentially hard-worked engine could sustain the expectations of a 4x4 offroad vehicle. This block is especially ideal for turbo applications as its ability to pass a larger volume of water and subsequent heat dissipation can allow for added performance in high end installments. These cylinder wall aren't known to be weak in their standard form but don't possess the same strength after boring when compared to other blocks due to their water jacket proximity.
L4
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