As the group and I are much more familiar with Rolemaster, I don't feel the need to make these notes as detailed. The purpose of this page is to outline how the Rolemaster system fits into the Morrow Project system.
In Rolemaster, the character's physical fortitude is represented several ways, including the Constitution attribute, but the character's ability to absorb damage is tracked primarily through the character's hit points (HP). As the character rises in level, the player is able to increase the character's hit points by adding levels to the Body Development skill. This represents the basic idea that a person could have vastly different body builds depending on whether an effort had been made to build strength and fitness. Therefore, the number of ranks in Body Development should directly affect the number of Structure Points and Blood Points the character has under the Morrow Project rules.
According to the Rolemaster Character Law, Base Hit Points begin at Constitution ÷ 10 (rounding up). A normal human character is allowed to increase Base Hit Points by 1d8 for each level of Body Development. This can continue until the character reaches the maximum hit points allowed, which is 120 for a normal human, plus the Constitution stat bonus as a percentage. Then the Total Hit Points are calculated from the Base Hit Points as: BH + (BH × Con bonus %) (rounding up). For example, a character with a Constitution of 90 receives a Constitution bonus of +10, which is expressed as +10%. Starting with 14 Base Hits, 14 × 10% = 1.4, which is rounded to 1, so Total Hits equals 15 (14 + 1). Then, if the character adds two levels to Body Development, the players rolls 2d8 resulting in values of 2 and 8, which raises the Base Hits to 24 and the Total Hits to 24 + (24 × 10%) = 26.
While it is possible to have a Constitution attribute value over 100, it is extremely rare in a modern-genre game. Therefore, the absolute maximum Hit Point value for a human character becomes 150. (Constitution of 100, yielding a +25 bonus, racial maximum hit points of 120, producing 120 + (120 × 25%).) The minimum Constitution attribute value is 1, therefore the absolute minimum Hit Point value for a human character becomes 1. (Constitution of 1, yielding a -25 bonus, no Body Development, producing 1 ÷ 10 = 0.1, rounded up to 1.)