Breaker contact; New .018-.024 Old .015-.022 , Thats for a 216. For a 235 it's .016- .021 Old .013-.018. I just changed mine now It won" start! PS Chev has a resteriation package for free, just need the year, and vin # EVERY THING you want to know about 53 chevy trucks is in it. I have a 53 3600 also just finished but now I can't start it! Call Chevy and ask for the package 1 800 222 1020 Good Luck, Paul
