I just finished rebuilding and breaking in my front end, so I decided to take my 67 Riv out and cruise wth my buddies. One owns a 05 Mustang( the one car I can't stand) the other a newer Civic Si. Somewhere between point A and point B we decided to have a race. I don't have a GS Riv so no posi for now, but we took off and I stuck with them until all four of my barrels opened up and sure enough they weren't there anymore and that's not bad for a car pushing 40 years.