I bought rockers that came with the factory pushrods and if this engine is anything like mine was, there is no alternative to replacing the pushrods; they were way too long. Mine probably turned out shorter than most would like (me too), but that was nearly 1/2 inch difference (7.080 vs 7.5). There was no way the 7.5" pushrods were going to work.
The ONLY way to get the correct pushrods for an engine is to measure for them after everything else has been assembled. There are too many variables after rebuilding for any parts manufacturer to offer a kit that works in all circumstances.