Never weighed those ET's but I presume that they are in the weight ball park of the Moroso's or maybe just a tad heavier since they look to have a more thicker skin sidewall.
I'm also concerned about thread design and tend to lean more towards the jagged pattern like the Morosos and Formulas for more stable contact patch.
I also remember using the Pro-trac front runners and they were great but a little heavier, again because of the sidewall design which is more resistant to rolling or folding and tearing on the street.
I can't believe that people got away with Volkswagon tires for all those years going fast MPH. Of course today's MPH numbers are insane even on the 1/8.