I am not big on package deals mainly because there is a reason why it is a "deal" with some weak links in the rotating assemblies.I have spent tons of time looking at that and know that is the case.
For the price of getting a 1996 or later L31 truck block(tons of them out there cheap)it's hardly worth paying for the very expensive hydro roller cam conversion kit for a earlier block.You do want to take advantage of the hydro roller cams for their cam profiles for one,along with so many other features.

This thread although long,is my build with three of the most knowledgeable people this site has.Your going to read twists and turns and some paper errors I made in calculating compression ratios to come to what I believe is a solid well thought out build.

383 build-Something Caught My Eye