Paul, They're Streetliner Classic radials, whatever that is. I run them on the street and (@45#) use them for the PSMCDR also. The word is that the relica bias ply wide ovals are the best for pure stock. I can't prove or disprove that theorey. The fastest cars seem to run the bias plys, but the 60 foot times don't seem to be any better than the radial cars.
I used them for the same reason you liked them, $65 and narrow whites.
Frank