I know this is unlikely ... but I gots to ask.
Anyone got an M84 tune that would suit a SOHC Volvo "redblock" motor?
Or alternately, are there conversion programs to get the old 2-Group file into an M84 format? Even if that's a multi-step process. I suspect it's going to be a case of having the old DOS program running in the background & hand-converting into the new program, but also figure it can't hurt to ask.
This is really just for starting, once I know it's working I can get it to someone who knows what they're doing WRt tuning properly.