STARTED OUT WITH STOCK 365 MAGNUMS ADDED MANLEY VAVLES CHANGED CAMS, WHAT WOULD BE THE ADVANTAGE OF GOING TO 468CUBIC INCH BLOCKS?

I think you may gain more from the cam change than adding 14 cubic inches. Unless ofcourse your block required an .060 cleanup.

454's have an air flow restriction that is the cylinder wall at the intake valve. Boring the cylinder to .060" over will give a significant airflow increase and will give more power than just the displacementr increase would indicate. Notching the bore will still help, but not as much as with stock bore. No matter what else you did, the unshrouding of the valve is very helpful.

UNShroud THE VALVES ,468/OR SONIC CHECK BLOCK GO 100 OR 125 OVER THEY DO RUN GOOD

There is no substitute for cubic inches

Just one thing Fred, Cubic dallors!

If your going to play, your going to pay!!!!