Road Racing/ Auto X

I did a couple SCCA Autocross events this year(one on a wet course, yes, They run in the rain) and one last year. Street modified class. Didn't finish in the top 3 but finished ahead of a 03 Dodge SRT 4, 93 Mazda MX3, 91 Honda Civic, 88 Chrysler Conquest and a 93 Ford Mustang LX 5.0 in the SM class this year. There are pictures and specs of my car(74 Duster, the DemonDuster) in my photo garage. I think I can do better with more practice. Also maybe a set of competion tires, heat cycled with shaved tread might help. I also circle track raced a few years ago.