[Fasterthanyou]

I just so happened to have a chip all ready for an L03 with 081 heads (minor exhaust port clean up work), edelbrock TBI intake, headers, and an L98 cam with matched 68# injectors. That Lt1 cam will put a little more breath in the top end and the BBC injectors will be plenty of fuel for 13's. I'm running small ass 65# injectors at ~28psi (100# now) and have fuel to spare.
The tricky part is the 305 and the 081 heads. They're no super head like a vortec or other fastburn so you're not going to gain enough (in my opinion) to get a street weight 3rd gen into the 13's. You need more cam and bigger (or better) heads. OR more displacement and better heads. Think about it, Lt1's (fastburn heads, Lt1 cam, and 350 cubes) completely stock with minor exhaust and cheap intake ducting are just in the 13's. Now try that with smaller less effiecient heads and 45 less cubes, not exactly "easy." With traction, maybe, but those heads aren't much better than stock swirl ports.