Been running a TST twins and mp8 for about 100k miles.

Well the p0148 code came one last week and the rail relief sensor was leaking so I it replaced as well as the rail pressure sensor. Probably won't be putting the MP-8 back on.

Being that I haven't been looking at boxes or programmers in the last 8 years, what's the "favorite" right now?

The TST works fine, but curious if there is something better.

 

There is absolutely something better. I recommend EFILive. Get the Flash Scan and either tune it yourself or buy tunes from a tuner like Zach at Starlite Diesel or Les Szmidt.

 

I don't believe that EFI Live is available for his year, and likely won't be for awhile if ever. Smarty would likely be the best bet.

 

^^^ x2 the above.

I still run my smarty/tst stack, but the smarty does 99% of the work as it is much better at the task.

Look at the smarty UDC... I have not tried it yet but seems to be the next best thing to EFI live.