hello i am currently taking apart an old 350 and i was wondering if anyone could tell me what size the 12 point bolts are that hold the connecting rods together


and also what is the difference between solid and windowed main webs and how can i tell which ones i have

 

aren't they 9/16.it's been a while sence i've been in mine. but i think it was a standard 9/16 12 point socket.Edited by: stevesolds455da