Hey Mikey,
My problem is that I'm in Australia, we had one maybe 2 cars that have a Chev Small Block in them (HT I think) and they were back in the 70s with a carb. Everything they tune here is a LSx and there might be maybe a handful at the absolute most of other people here in Australia that have done a 24x conversion.
All the shops I've talked to about tuning it don't have a clue what I'm talking about when I explain the setup, which doesn't instil much confidence.
My main concern is without them knowing about the 24x conversion and just trying to tune the tables like they would for an LS1, they'll
1) Not be able to do it
2) Spend a lot of hours ($$$) trying to tune it
3) Damage the motor
4) Hand it back to me no better and with a 1K+ bill.

If tuning is as simple as doing a run on the dyno, taking the readings and adjusting spark and fuel until the maximum power is obtained, and then extrapolating the values measured into the areas of the map that weren't measured using smoothing or calculations, then it will be fine I guess, so long as he uses the base tune LRT has configured for me, and doesn't start from scratch with a base tune and miss out things like bank assignments etc.

If it requires knowledge and understanding of the differences in the SBC spark requirements and timing then it may be problematic.

There's also the risk of "tuners" just using a library of LS1 motor tunes that they charge an arm and a leg to flash a generic tune which won't come anywhere near what mine needs.