I wouldn't waste my money at your mod level.

Honestly...even with 100% Methanol you might be able to get away with a 3.4" on your GenV. Also...until you drop pulley sizes, you want the hottest spark possible...104's would only hurt you really. The 180* wouldn't be as ideal either unless your tuned...you can only benefit from a lower temp T-Stat if the fan turn on points are lowered in the PCM.