Hi, Noob here lookin 4 buying assistance

[RWDSteve]

Already made a few posts on here asking for info and i'm very impressed with how helpful everyone is, especially Northerner with his in depth parts list for an Auto to Manual Conversion, cheers mate.

Got another few questions, is it normal for an s12 to shake when it goes over 90mph? Just looking at the black one on ebay. Also, what will they do, as standard, flat out? AND, this is a real noob question, whats the difference between a Mk1 and a Mk2?

Any feedback appreciated, cheers

Steve