Heres what I used in my LB7. I tried plotting the two against each other, and had several spots where desired didn't match actual, so I came up with this table. I do run a 2250 pulsewidth though, so the upper ranges of mine will be a good bit lower than a stock truck.
1995 GMC 2500 SUBURBAN powered by 01 DURAMAX/ALLISON, little of this, a little of that,
DIAMONDEYE 4" exhaust, CORSA muffler, AFE stage 1 dry filter, custom tuning by me, KENNEDY single pump and pump rub kit.