I've decided to pull my truck work stock and I've read through the rules and searched on here, cumminsforum, and google and I can't find anything so I thought I'd just ask questions. What I want to know is in work stock is it okay to use programmers/chips? are larger injectors okay? Is a cai okay? can I have an aftermarket intake manifold? and I have a gdp mechanical lift pump is that okay or would I have to switch it? Thanks for any information that you give me and sorry if these questions are stupid.