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This is the one I put in my 96 LT4. I did have to buy the new roller lifters and rocker arm studs separately. On the LT1 if it has 3/8 rocker arm studs you wont need ones. You will want to install new lifters.
Mine is a lot of fun to drive, power on command. Has a good sound too.
Shows not available now but I would bet it comes back with time. "stuff" is hard to get right now. Be patient and buy the right parts for your application and desired results.