Converting Fortran code to Julia can bring benefits such as high performance, modern language features, and a growing ecosystem. However, there are considerations, including the porting effort, numeric code optimization, availability of specific libraries, and challenges with legacy code.

I have written 141,910 lines of assembler, 461,900 lines of FORTRAN, and 2,589,546 lines of C, for a total of 4202 code modules and over a thousand programs; so I speak from considerable experience. Forget Julia. Translate the FORTRAN into C. I have converted hundreds of thousands of lines of my own code and that of others from FORTRAN to C. There are tools to help. Cobalt Blue is good. Any of these will require considerable editing before the code is ready to compile. FORTRAN and C are both very fast and efficient. Silly novice languages like Julia and Python are pathetic and inefficient. You can find free library functions to do most anything in C online. Digital Mars is a wonderful free C compiler written by coding pioneer Walter Bright. You can use MS Visual Studio free too. If you're stuck with LINUX you'll have to use GNU.