i was playing with my own personal mod pack & when using the blood infuser to make dull dust into redstone dust, it would crash i loaded the world back up to see what happened if it would in fact load again it did only to find that the dull dust was gone, but the world was unaffected. i tried it again but on a world that use to testing mods & other things & it didnt crash so i thought it was a glitch, but when i looked in the infuser on my survival game, i noticed that it didnt have any blood in the machine, so i tested it again, but on my test world, no blood same upgrades, with the first upgrade "promise of tenacity I" & it did in fact cause the crash. i figured i'd let you know about the crash. & if you would like a crash report i can give that too. Here's a list of mods i have in the pack:

minecraft version 1.7.10
[1.7.10]bspkrsCore-universal-6.15
adventurebackpack-1.7.10-0.7.3
Baubles-1.7.10-1.0.1.8
buildcraft-6.2.0
CodeChickenCore-1.7.10-1.0.4.29-universal
CodeChickenLib-1.7.10-1.1.1.110-universal
CoFHCore-[1.7.10]3.0.0B9-40
Damage-Indicators-Mod-1.7.10
EvilCraft-1.7.10-0.7.0b
FamiliarsAPI-1.7.10
FamiliarsDefaultMobPack-1.7.10
FamiliarsExtendedFamPack-1.7.10
FamiliarsHerobrineFamPack-1.7.10
Flans Mod-1.7.10-4.8.0 modern warfare, guns only
iChun-Util-Mod-1.7.10
ironchest-1.7.10-6.0.62.742-universal
LoK_SoulReaver-1.7.10(0.4.8)
NotEnoughItems-1.7.10-1.0.3.74-universal
OptiFine_1.7.10_HD_B4
Reis-Minimap-Mod-1.7.10
Thaumcraft-1.7.10-4.2.1.4
thaumcraftneiplugin-1.7.10-1.6a
ThermalExpansion-[1.7.10]4.0.0B8-23
ThermalFoundation-[1.7.10]1.0.0RC1-13
Tree-Capitator-Mod-1.7.2-1.7.9

for the record this is the only crash ive had so far with these mods, but i havent gotten very far with playing my survival, as soon as it happened i made this issue report, its not a big problem the mod works great otherwise

Thanks for reporting this issue, it has been fixed.
You can either wait for the 0.7.1 release (which shouldn't take too long to be released when no other reports come in), or download dev build 234 from here: https://drone.io/github.com/rubensworks/EvilCraft/files