Cheap, LS beehive Valve spring setup for 340??

I read somewhere on here before, that there is a good quality and relatively cheap LS beehive spring swap that can be done for moderate valve lift, under .500". I couldn't find it in the search engine, but was wondering if anyone knew the numbers or applications.

I'm reconditioning a 73 340 that I scored over Christmas, on a budget.

Thanks
Chris