I fitted this nice vintage radio on my original Tamiya Egress of 1989. take a look also in a previous post on my blog.
I own also a Tamiya Vintage avante of 1989 with his dedicate radio Tamiya ADPEC. This radio had a lap timer integraded on the steering wheel.
http://japan-hobby.blogspot.it/2011/03/tamiya-egress.html
http://japan-hobby.blogspot.it/2010/11/tamiya-avante.html