I am very interested in this thread, as I am building a 454 myself. Would you please expand on your the pistons selection. I plan on using a Lunati 292. (http://www.holley.com/00024.asp
) w/ a 3000 stall. Same set up with your heads. Except a 3 angle job. Are you sure that the noise is not the hyper's and not the cam? Does your 750 perform good on the 454?