Competition DVs

Been a long time seen i have been on here or posted and im seeing quite a bit about competition DVs now out there. Hearing the fuel better then full cuts and reduce low end smoke a bit. I have 191s in my truck right now and have full cuts laying around. Question is are they worth it, how much do they cost and where do i get them from??



I should mention other mods- CDS 12mm pump, ddp 140s, twins, cam/ springs, supporting mods.



Thanks