This bike was made in Kent Washington in the mid 80'S. Huffy bought Raleigh after sponsoring the olympics and wanted to make an enthusiast road bike. There was the 420 460 480 and the Scott Tinley. I am not sure how each was speced because I bought my own components.
The top tube, seat tube and down tube were aluminum ,6016 I think. The internal lugs were steel, as was the seat and chain stays and bottom bracket. The tubes were pushed or swaged onto the lug that had two diameters like a graduated step with the first being smaller than the second. Adhesive was applied in the process so the downtube seat tube and top tube were swaged and glued together .There is a decorative ring there to hide the joint. The chain stays were brazed into the bottom bracket. There was never a failure.

Criticism was that Huffy had not taken the design far enough and chickened out by not making all of the tubes aluminum.

I put Campy Chorus on mine and have always enjoyed it.