360 push rod dilemma

I found some info (online for whatever that’s worth) that some small blocks, 318, 273, and some 360 had .28 diameter pushrods from the factory. I have to say Ive never measured a stock one to know but I guess it’s possible. I have a stock 72 318 I could measure if I get curious enough. But I agree with above, order 5/16 in the length you need and move on. You have the stock paddle type rockers which will be fine