Inherited army questions

Recently bought a box of mixed HH and 40k space wolves that I have a few questions about.

1. Ive got about 20 HH marines equipped with bolt guns and chain swords. In 40k, this is great, they'll be fine grey hunters, but they were clearly intended to be grey stalkers for HH. Since those don't exist anymore, is there any way to run that loudout, or do I just have to run them as tactical marine and tell my opponent to please ignore the chainswords on their belts?

2. Also the proud owner of 10 Varagyr terminators now, and I've never seen them in person before. They are massive, close to if not the same size as the new scale terminators from Leviathan. Are they supposed to be this big or are they maybe an upscaled recast? (there are bags full of bits from both forge world and a chinese recaster in this box so as far as I can tell they could be either)

3. same story with a contemptor. it's noticeably a half inch taller than my plastic one, but definitely the old full resin FW design.