A single eight track tape of 'Saturday Night Fever', a Peterbilt emblem, a October 1979 Playboy magazine signed by Burt Reynolds, and a bag containing 1,734 Quallude pills."

This seems like a huge HONEY POT time capsule put there by Hugh Heffner - CIA perhaps?

1. Eight Track of Saturday Night Fever - (Music; John Travolta/Disco Era ultimate male specimen of that time)

2. Peterbilt, as in 'Peter' another name for a penis

3. Playboy Magazine; CIA Honey Pot Black Op videos, dossiers, etc to entrap Celebrities/Politicians/Corp Execs, Playboy Mansion, Hugh Heffner

4. Qualludes - Downers to calm the ones being blackmailed!