OK after much searching I have found the article in Sports Car International Apr/May 1999 by Richard Prince on the Scaglietti Corvettes. If you could access this it would help you out a lot.
Prince's information states that 2 of the chassis were equipped with 315 hp fuel-injected engines, four speed transmissions, Cerametallix brake linings and Positraction. The third was equipped with a detuned 230 hp engine with Powerglide; this is the car that ended up with Jim Hall. Hall used it very sparingly and sold it on to team photographer Donald Weeks.
Differences in appearances existed with the 3rd car having front fender louvers, a hood scoop and egg crate grill; the others had modified Corvette type grills. This 3rd car was one of the high performance ones.
2 of the cars are photoed for the story, both red but there is no information on the original paint.
The alloy body saved about 400 lb and in conjunction with the hot engine the car was very fast. However, Laughlin said the handling was practically lethal. While this could have been readily corrected with local mods and tweaking, he was reluctant to spend even more on an expensive project and the car was sold off.
As you say, some differing info appears on the net. However this article is well researched with both Gary Laughlin and Sergio Scaglietti interviewed for the story. I would tend to go along with this account. It is well worth checking out if you can. Thanks for bringing this up again, they are great looking rides.
Edited by D28, 19 January 2017 - 13:48.