lifter pre load, please advice

Made my own adjustable pushrod with the help of an old one I had in the garage.
Splitted the rod into two pieces and then threaded a metric 3 mm thread in the rod so it can be adjusted.

Anyway, found out I´m going to need another set of pushrods that measures 8.502". I´ve browsed summit racing online catalog and found a couple of sets.

Which set would you guys recommend? It`s a rather large difference in the prices.
Would it be safe to go with the cheapest or what do you think.


http://store.summitracing.com/partdetail.asp?part=CCA-7649-16
or
http://store.summitracing.com/partdetail.asp?part=CCA-7763-16
or
http://store.summitracing.com/partdetail.asp?part=CRN-95650-16

Many thanks in advance /Lenny