[averagef250]

But I do know that the FE block would come apart after 4500 RPM.

I ran a bunch of 'em. Never had a low end issue with an FE, actually, they're kinda notorius for having a pretty rock solid bottom end. The 427 SOHC ran piston speeds in NASCAR testing in the 60's that should have sent it back in time.

I had a windage tray on the FE in my truck. It didn't make a noticeable difference in mileage.