Hello looks like a nice solid lugged frame. the brake lever seem to have been up graded to shimano exage aero levers but the hoods seem to be missing or severly damaged.
now as for dating and identifying. pics from the chain side of the bike. close ups of the head tube area and any detailing on the luggs. close up of the sear lug. and the rear droputs that will help other figure out (if they can) the make of frame. close ups of the derailuers will also help with figuring out the year. wether you intend to sell it or keep and ride it fix the headset. as I am sure you know from BMX a bad/misadjusted HS can ruin a frame.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk