Further to my earlier comments, if you wish to do this as a Soviet operational Tu-91, I would consider the following:
The Tu-91 first flew May 1955. Therefore, one could expect it to be in service from the late '50s through the '60s and probably into the '70s and maybe even '80s, though being designed to be carrier based its life might have been limited due to the strains such operations put on airframes. It was also reportedly to have a weapons load of up to 1,500 kg (3,307 lb) of bombs, rockets or a single torpedo. As such, one doesn't have a real lot to play with if you are trying for realism.
It is quite likely that it would have been equipped with guided missiles during its life though. Looking at the type of Air-to-surface missiles developed/fielded during the period in consideration we see the following which have potential (ruling out the large ones one of which weighed more than the Tu-91 itself):
Kh-23 Grom (AS-7 'Kerry'): This weighed around 287 kg (633 lb) and was somewhat equivalent to the US AGM-12 Bullpup. It entered service in the late '60s/early '70s (if you include the earlier Kh-66 development).
Kh-28 (AS-9 'Kyle'): This weighed around 720 kg (1,590 lb) and was an anti-radiation missile (i.e. anti radar/SAMs) and could be considered somewhat similar to the US AGM-78 Standard ARM. It entered service around 1973.
Kh-25 (AS-10 'Karen'/AS-12 'Kegler'): This weighed between 299 kg (659 lb) and 315 kg (694 lb) depending upon variant. It came in two main versions: The Kh-25 original laser-guided variant and the Anti-radiation version. Other guidance versions including TV guidance etc were developed later. It entered service around 1975. One could consider it to be roughly equivalent to the US ABM-65 Maverick series.
Therefore, I could see a couple of options here:
A general attack version armed with something such as the Kh-23;
A Wild Weasel version armed with the Kh-28; or
A more precise, later era general attack version with the Kh-25.
That said, it is your call, so go for it and have fun doing so!
