I had ordered the MS4 cam package a few weeks ago and was planning on running stock heads for a while. After nicking a couple valve stems switching springs I decided to take the plunge and order the PRC stage 1 LS6 heads. So I'll be running Stage 1 heads, MS4, and GM gaskets. Will the 7.4 pushrods that I got work? Will the stock lifters and rockers be alright or should I upgrade while I'm in there?? For fuel injectors I found some 44#ers. When tuned will those be too big? I plan on running nitrous in the future. Thanks for any help