Attaching the tack to the bow roller or if you have one to a hole in one of the cheeks is fine. The bow roller is very firmly attached to the same stemhead fitting as the forestay. Ideally you should get the tack as far forward as possible, so a short bowsprit such as the Selden prodder is oftn recommended. However, it is expensive and for the typical usage of a cruising chute in light airs is a bit OTT.
I am just rigging my 33 (latest type) for a chute on a furler and am going to attach the tack to a U bolt that goes through the teak pad on the pulpit cross bar, which is braced down to the forestay fitting. It needs a bit of modification to cut the bracing strut off the cross bar, modify it so that the legs of the U bolt go through it and then strengthen the strut, which is currently in two parts slotted together before bolting it back onto the forestay fitting. The latest versions of my boat have a tack fitting incorporated in the bow roller.
Can't recall exactly what your bow rolle, forestay fitting and pulpit are like exactly, but you may be able to do a similar thing to my modification.