Dairugger XV wrote: *snip* runs off a nuclear engine that will last for years (though supposedly has enough Protoculture to initiate the man-machine symbiosis), and its radar and radio are greatly increased.*snip*
The VHT used the same kind of hybrid Protoculture engine as the Veritech Fighter. However, late in the war the ASC ran out of 'culture and had to switch over to nuclear only engines. Most of the talking heads around here, including this one, agree that if your mecha uses Nuclear only power, then it's bonuses and stats should be reduced to reflect that. Fussion are heavier and less robust or potent then their Protoculturesque contemporaries. I posted an article on some of my ideas in a thread called "Nuklear...er Nuclear power."
Black Market cost varies with the market, so they aren't listed in any of the books, you just kind of have to make that stuff up.
Destroid Flight systems come in the form of a jet pack that straps on to all but the MAC series IIRC, that only work in space, with a top speed mach one.