For that who regrettably until has a book Tony Buttler's 'Soviet Secret Projects, Fighters' .
Can offer information from journal "Planes of the world" 5.1997.
Except given brought on http://www.ctrl-c.liu.se/misc/ram/la-vrd.html, there is one interesting nuance leading constructor on airframe configuration, main ideologues of the project was not Lavochkin, but S.ALEKSEEV admirer/supporter twin booms of the scheme (a little later working on project "150", Lavochkin has deflected an offer Alekseev's in favour of traditional scheme, to account second tail for fighter "architectral exaggeration/Architectral bells and whistles" (My apologies Tophe)
Engine : S-18 /1250kg
Weights: empty kg. 2640
loaded kg. 3300
fuel/oil kg 500
Wing area,m. 15
Speed max.km/h 890
Armament: 2x23 (120rpg)
At http://www.aviastar.org/air/russia/la-150.php I read "The Lavochkin bureau's response to Yosif Stalin's order of February 1945 to design and build a single-seat jet fighter around a Junkers Jumo 004B turbojet, the La-150 was…". So, do you think the picture with both twin-boom "Predvarityelnii Proyekt La 150" (preliminary project La 150) and single-boom La 150 may be dated 1945?
The small addition.
To beginning 1945 , Lavochkin's OKB/design-bureau already has completely moved in Moscow (plant 81)
Preliminary project La-150 (twn-booms) is dated February-March 1945,
"150"(single-boom) and "160" - an April 1945.
sources:"Planes of the world" 5.1997.