NOTE: With the changes made in 1.6 I don't think this mod is necessary any more. I'll leave it up to support players on legacy builds and may revisit this in the future if there's interest.
What it does
This mod adjusts the specs on Making History engines and 3 stock engines to balance them and ensure every engine has a unique niche. The changes are balanced against other engines. If the thrust is changed, weight is also adjusted accordingly.
For full list of changes please refer