And the actual round profile for the OBD1/2 throttle bodies is different, so in essence not worth it! Now if you managed to get an inlet manifold off of a 2.9 VR syncro with OBD2 then your laughing but I expect they are like rocking horse $hit!
I did the same height all round on mine (copllars 1 inch from bottom), which ended up with the rear end slightly higher. Ive since tried to lower it more and my bloody FK's are seized :-(
Schrick manifolds came with or without the logo. As for the other bits it would be easier to post pics of what you have got. Has it got the throttle body adaptor at the back? Thats the only bit that is specific to OBD1/2 and if you have the wrong one then it will cost roughly £250 from Stealth IIRC for the right throttle body adaptor.
You also need the carriers, 5mm longer caliper bolts and 5mm spacers. You dont need the calipers if you have 288mm brakes as they use the same calipers.