Harry T.
The white Harry-T.-GTA is LHD (see post 280), whereas the later used green one is RHD.
The white car could have been #613151, sold to Filipo Theodoli, New York, according to "Alleggerita". Harry T. showed up with Theodoli for the 1966 Sebring TransAm race, race no. 37, a Theodoli entry (not sure if it was a white car); later Theodoracopulos drove a white car (with race no. 37) throughout the season without Theodoli. In 1967 the same white GTA got race no. 82, 37 was mostly used by Jim Baker in a yellow one (see post 278). The last pic I saw of the white car was at Lime Rock 19680530. Harry won a 1968 North-East Championship, it is said to be the ex Kwech one transformed to GTAJ, but the first pic of that green car with Harry T. is from Michigan 19690511.
Since the GTAJ was introduced in mid 1968 and did not run in FIA group 2 (T1.3) before 19690201, I am not sure if the american equivalent CSedan saw GTAJs in 1968. Harry T and the others should have converted their GTAs to 1300 cc not before 1969 (and Harry raced both BS and CS in 1969). For 1970 the FIA banned the GTAs to group 4 (GTS1.6, similar to the Porsche911), that is why many GTAs were converted to GTAJ to race the standard touring car class. Since the TransAm rules saw only two classes (from 1966 to 1970 O2/U2, in 1971 and 1972 Championship and 2.5Challenge) the CSedan and BSedan were in the same class and it is not sure which car got a new engine.
Knauz
In the late 1960s you could have ordered a complete GTA body from Alfa Romeo (according to the spare parts catalogue), but I do not know if they had a VIN stamped.
Knauz is known to have got GTA #752648 in February? 1966 (before the Sebring race), #752573 in March 1967 and #752536 in July 1967. Interestingly the highest VIN was the earliest one delivered to him; and #752536 was built 19650722 to an unknown source, two years before it had been delivered to Knauz. GTA #752536 should be the car instead of the destroyed Winkler no. 62. So what was the second car they did enter at Sebring 1967? #752648 was already sold before to John Martino.
Monty Winkler was together with Horst Kwech in one car at Riverside TransAm 1967, the other Knauz car was driven by Del Russo Taylor. The next TransAm race at Las Vegas saw Kwech in a Knauz car, possibly Del Taylor in a second, Winkler is not mentioned. And the last race at Kent had Kwech and Taylor mentioned, but not sure about their cars.
There was a Bill Taylor with Robert Pratt in the 1967 Mont Tremblant race and with Gaston Andrey at Lime Rock Park TramsAm, not sure if it is Del Russo Taylor or another guy.