I guess the question is the stock push rod length of 8.687" for stock engine with mild cam? I have seen ads  on ebay for push rods of 9.137" any help, appreciated. Ron  

you should really measure for correct length you didnt mention if the engine was rebuilt if so take into consideration material milled to get everything flat such as milling the heads. also are the rocker arms factory? regardless the rocker should ride in the middle of the valve stem ( rotate engine and watch through the rotation)