That looks to me like a 3" LT-1 maf.. Measure the openening of the maf 3" = LT-1 3.5" = LS-1.....
The translator usually has a version written in the white box on the lower right side..Nothing there on yours could have worn off....
Don't know what chip you have, but my Turbo Tweak chip has the dip switches set as follows : on,on,on,off