Hi,
It is difficult to do such thing because we can't say the number of lines that a product name will use.
It depends on the font-size, on the text length, on the width, etc.
So except you use a javascript script which will read the height of each boxes in the page to find the larger, and then apply this height dynamically to all other box elements.. I don't see how it can be possible with PHP because we don't have any knowledge about the final user rendering.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.