Sounds like an interesting conversion Tony, and would love to see some pics of the real one and the model, when possible. If you mean resin conversion parts sticking to the polystyrene kit parts, then in most cases 'Superglue' should do the job.
I can't see you needing anything stronger in 1/72nd scale, but large, heavy parts might require a two-part epoxy, but I've never had to resort to that, even in 1/32nd scale.