need help Bad-excuse me for being stupid

The heads I believe are the 452 heads. I just went ahead and put the autolite 85's in. that is what it called for at the parts house. That also is what the application from Summit was. I looked up the application for the RV12C and it was all Chevrolet. Hell, I don't know why they were in it. The instructor at the vocational school where my son went 10 years ago did some tuning on it. It had a stock dist. in it and I think they were playing with the weights and stuff in the dist. and he put those plugs in it. I since changed the dist. when I was able to get up again.