hi
as you can see from photo while the LIm has larger ports the SVT/ST200 UIM does not and you have a large step right round
now i know the butterflys and shaft in the LIM will cause a bit of an obstruction
next thing what results might there be if the ports in the UIM are opened out a bit to match the UIM port size a bit more

http://www.imagestation.com/picture/sraid125/p6fc493c34d1efadb780ef3da91ae97a2/f8094bff.jpg.orig.jpg
art