Mike, thanks for your input and for straightening me out on my incorrect assumption. I also got the following input from Gary Goeringer who drives the ex-Bill Maier '68 Mustang in the Historic Trans-Am Group.
"The track has changed quite a bit since it first opened. Just a few of the changes: The front straight has been narrowed and realigned to prevent crossing over the drag strip, T1 also had to be modestly realigned to accommodate the changes in the straight. The camber of T5 was changed significantly when the NASCAR extension was installed....... and (IMHO) the biggest change was to the configuration of T7--there is now two used configurations of various lengths and corresponding apexes, exit widths--it makes a big difference for me.
Parnelli's pole time in '69 of a 1:45 is clearly 'flying'. I'm not sure Epsman's ex-Follmer Javelin with Kenny on board (the fastest driver/car combo in the group) could come close. To put it in real world terms, and this isn't a comparison to PJ, I can turn 1:54s pretty much all day. On a 'flyer', I have been to the high 1:51 range once or twice, but generally, in the 1:52s. Kenny's is generally about 2-3 seconds faster--that would put him in the 1:48-1:49 range. And remember, our tires are WAY BETTER (and way smaller) than what was on the cars in '69. Bill Maier's best times (that I have seen), were mostly in the 1:58-2:00 range--with slicks!!!"