The article was real interested. They compared a complete Pangara, a Porsche 914, and a 73 Pinto equipped with SPearco interior parts such as a 13" leather steering wheel, console, shifter, instrument cluster on top of the steering column with a digital tach. They also had the seatbacks raked an extra 20 degree's by removing the latch hardware. Suspension wise, the pinto had a Speraco Riverside suspension kit which lowered the car 7/8" in the front and 1" in the back with 3/4" front and 5/8' rear sway bars. The kit included HD ariston shocks. The car also had a chin spoiler.
From what research I did, Mr Spearco started the company with Carrol Shelby as a partner. Once SHelby lost interest, Spearco bought out Shebly. They don't seem to have a web site but it did appear that they are into Turbo stuff now (as mentioned above) Too bad, I would like to have bought some of the parts shown in the article.