Here are the records you are going against in the 1000cc class:
S-BF K. Lyon BMW ' 88 197.121
S-BG K. Lyon BMW ' 90 211.698
S-F Burt Munro Indian ' 67 183.586
S-G Riches Airtech MDR OSXR 8/03 179.523
I have no idea why you would want to build a conventional motorcycle into a streamliner. The drag would be enormous.
The whole idea is to think what will make it go fast, and build it that way, not take something you have and try to make it fast. It never works.
The SCTA doesn't care what you build, they are only concerned for your safety. The rules do assume a rider separated from the engine compartment, but as long as you can meet the safety aspect you can run anything.
These are all soft records. Joe Amo has gone 223 partially streamlined, and 240 blown. Don Vesco went 251 with a 750 streamliner.
Heck, you might consider A-BG, there is no record there.