[DIRTYDOG427]

I too ordered new shafts from Precision , Clovis CA.. along with the end stands..Doug seems like a good guy.. He could have sold me new rockers along with it, but said that I ddidn't need em.. do rockers give much added HP? He said it would give me extra 300 rpm if the motor was good with it.. My engine has new ARP rod bolts but old parts otherside.. stock cam rods etc.. and because of vintage parts I didn't think I needed it to rev any faster esp in the high rpm range...This shaft failure has made me realize how much I want to preserve this 427SO.. and I can always add the rockers later..
Thanks all of you all for the help.. I am still open to why these gave way because I only had 2000 miles on the motor since it was freshened (I have no way to tell how many miles the shafts have on em) and they are not the thin shafts..I think they are the thicker shafs...175 wall thick .. I think Doug said the new ones would be .250.. Have a look..and thanks again..