... Most people would think that DSTRYR on a 440 6bbl Road Runner, a Plymouth- (Dodge had the Scat Pack program and started the marketing for the 1970 model year) is bragging about horsepower and has connotations of racing.
Dodge started the Scat Pack, had the SuperBee, Dodge Girl, the Sheriff, etc ... but the Plymouth cars were often lumped in (as a courtesy) since they were Mopar relatives. The original Road Runner, Hemi 'Cuda & SuperBird were the most popular of the Plymouth muscle cars (with the Hemi 'Cuda being more popular, even as a limited production model, than the Charger 500 Hemi or Challenger T/A). The Daytona Charger always had the premier place of honor in the showrooms, though.
I remember when dad brought home a '70 Challenger R/T convertible 440 Six Pack, with that funky looking Hurst pistol grip shifter. He kept it as a demo for a while. I think it was initially brought in to be used as a pace car for a local race (but I wasn't particularly a racing fan). Fun car.
I still have a bunch of advertising stuff from that time period, including some of the 3D cards/promo of the new '70 Challenger, in Plum Crazy, featuring the Dodge Girl. I also have the folder of black & white promo material & pictures for the Charger III that Dodge sent around with the loan of their Mock-up car.
As Far as the Remo Williams, The Destroyer paperbacks? Fun stuff written in the 60's that didn't see print until the beginning of the 70's. Light-hearted spy/martial arts genre of the day. Not as dark as the James Munro spy novels featuring John Craig, martial arts-trained assassin for MI-6. He (the character) also thought the Walther PPk and S&W M36 were hard-hitting weapons. I think I remember a description of "like a brick thrown through a plate glass window", or something to that effect. The books ran from the middle to the end of the 60's (4 paperbacks), with the last one being released a couple years before my formal introduction to Shotokan (helped along by the Craig novels, among others).
It was the John Craig character's use of a Lamborghini Miura that made me first decide it was the greatest mid-engined sports car of all time.
Even the De Tomaso Mangusta (US version) couldn't dim my desire for a Miura. The first & only time I was able to sit inside a Mangusta, I understood some car writer's comment about the low height of the top of the windshield ... something about "safety by Gillette".
For the gun stuff, I think it was Asset in Black that had the character use a Colt Commander with the then-new all-lead 230gr Scorpion Hydra-shok .45 ACP ammo, which was sold in red Ammo Wallets. I think I gave my last box (wallet) of it to my brother many, many years ago. I don't have the book anymore, but I've been thinking about finding & ordering a copy. Interesting mid-80's spy stuff written with a bit more of an interest in the firearms used, as I recall.