Woud it be wrong to think of the main spark table as such?LV8 of 64 to 128 would be for tuning at idle to light throttle,128 to 192 is part/moderate throttle.My table stops at a LV of 208,but 208+is wot(plus the wot vs rpm table).I have'nt tried to tune this way but just trying to form a idea.

 

LV8 is MAF's "calculated value for MAP". Based on my brief scan on that part of the MAF code, it appears to involve the TPS and flow to calcuate a "MAP-like value".

But your logic (low LV8 = low load and high LV8 = high load) is correct. The actual values I cannot comment because I don't have the amount of "observation time" on working with MAF as I do with SD. But I would capture some data and note the LV8 values when cruising light throttle around 60 mph, the LV8 will going up a light grade and a heavy grade to guage the typical LV8 values for "light, moderate and heavy" throttle.