Last year I had a very nasty experience with light alloy push rods - see first photo below. So I would not use them again. The other point was rub marks along the rod which indicated to me that theyhad been flexing.
I then bought a set of original type rods. Wassell make. They were dreadful, the ends were not properly machined - see second photo. They were sent back to supplier. Would not buy rods made by them again.
Finally got a set from SRM which were delivered the day after I ordered them. Top quality. Heavier than standard ones. No rub mraks evident to indicate flexing and I am very pleased with them.
Last photo shows light alloy rod top, next nasty Wassell rod and bottom the SRM one.