I know the carbolite 103 tubing was Peugeot's standard-issue steel, used on entry level bikes.
Beyond that, pictures are a tremendous help.
Welcome to bikeforums!!
Stick around... there's tons of info here... I posted my "I'm new to the biking thing" last summer, and have learned a LOT in a short time.
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A race bike in any era is a highly personal choice that at its "best" balances the requirements of fit, weight, handling, durability and cost tempered by the willingness to toss it and oneself down the pavement at considerable speed. ~Bandera