In hindsight, I should have posted this thread first. 
But I got so caught up in posting all the documentation about the first 6 Model Car Science - USRA Road Races from January through June 1969 I just couldn’t stop! 
I stopped with the 6th race (that preceded the Westerns States Championship) because the rest of the races really evolved into McLaren Mk8 bodies with wrap around "NCC air-control" and cutting down Mura 16D's into essentially a C-can motor.
Now I like these cars too but I'm going to focus on the earlier cars.
What happened was, I haven’t built an anglewinder slot car in so long I was afraid I’d forgotten how! But I also haven’t been in the mood to build something that only barely resembles a “real” car... what to do? 
When I ran across the pictures of the series my interest peaked. The cars looked pretty good for state of the art Pro race cars. I started to compile information about the series and the more I researched the better I liked what I saw. 
The 1969 MCS - USRA series had Sports Cars, GT, GP and Stock Cars. It used a wide variety of bodies many of which are currently available from TrueScale. Most of the bodies shown in the 1969 Auto World Catalog could have been used by entrants in the series.
Diaplanes and spoilers didn’t show up until the end of the series. The first 3 races MAY have been completely free of “air control”. The concours cars were not so afflicted. Heck they even had my beloved wheel inserts! 
Some may argue that the GP cars don’t look right, “they’re too fat!” Well, yes they are fat, they’re covering up an anglewinder! But they’re GP cars and what a blast they are to build. There are a half dozen or more different GP bodies currently available with lots of cool engine details.
This series also had an interesting evolution of the anglewinder chassis. Starting with mostly brass “zillion rail” frames with motor boxes and plumbers mounted on the main rails behind the front axle. They progressed all the way to the first versions of Bob Emott’s 2-rail per side, plumber on the arm chassis called by Mike Morrissey, “a foolproof chassis design”.
The motors also evolved. There was the Mura A-can (including an occasional cut down version), the first Mura B-cans as their Pro mentors tried to get them working. A B-motor even won the 6th race! 
The Champion 525 and later on the Orange Picker were also available and talked about (if not used) in the race reports.
So, I’m going to build a few cars that fit, as best as I can, into the spirit of the different races. I’m going enjoy building them to be as close to the way “they were built” as I can. It’s fun seeing how period cars might have performed back in the day. There should be an interesting evolution of performance between the 1st and 2nd Sports and GT cars and the ones run in the 5th and 6th races. Not to mention building and running the wild GP cars!
In order to check out their performance I’ll be shipping the cars down to Rodney to try out on Eddie’s blue King. Rodney and Steve Okeefe might also build a few.
My first car is going to be a GT from race number 2. 
Onward!
