I believe the LSA ones have been discontinued, or are at least much more difficult to find now. The ZR1 part number seems to be a lot easier to find...
i LS swapped my 2001 S10 with a LM7, 103mm throttle body Jeggs intake, stock injectors, LS1 MAP sensor, 5 pin MAF sensor, PAC1218 springs 706 heads,...
That explains the first crank never starts and then the next few die out… my tuner (who is out of town for a week) said that the injector data needed...