Dlowe,
My block is a 74 and my stroker was built by Canton Machine Works in Canton, Ohio back in 1996 and I have never had a problem at all with it. It is stroked out to 416 as I was a little afraid to go to the 427 but from what I hear they now have them very reliable. Another person I know had his stroked to 410 and has ran it extremely hard with no problems and it was built in 1997.
Ron
