The rules I'm using for Star Punk Dreams are 5150 No Limits. It has several things in common with Nuts and other THW rules & several things that are different.
What is the same is the use of Stars, Grunts, NPCs, attributes, passing d6, and other core mechanics.
5150 No Limits is a broad set of science fiction rules that include encounters for space travel as well as encounters on planets or dirtside. As an example, 5150 Fighter Command has more detailed dogfighting rules, whereas there's some abstraction in 5150 No Limits.
What is different from Nuts is that a battle board is used instead of a 3' X 3' table. The In Sight mechanism is replaced with the Action Table. There are still PEFs they are resolved a little differently - instead of using line of sight to resolve the PEFs, the PEFs are resolved on a table referenced in the encounter. Cover is treated differently on a battle board than what is done on a table with terrain.
So, a lot of the core concepts are the same as what you find in Nuts, there is more abstraction in how the game plays allowing an 5150 No Limits encounter to be played more quickly. If you are interested in retaining the table top, check out the 5150 Missions rules which can be played using either a table of battle board.
You can also add table top rules to 5150 No Limits by importing the ones used in Chain Reaction 2015.