400's are they any good?

Doosterfy said
I just got my hands on a 72 400. I'm new to Mopar so I'm not an expert. I want to know; If the block checks out good with magnaflux and a sonic check, and I spend the money on doing the aftermarket cross bolted mains and good high quality reciprocating assembly, say a four inch stroke for a 480 cube motor, what are the limits of this block? How much power and RPM can these motors handle? Where/what are the weak links? Can they take say 1000 HP 8000 RPM? How strong are these blocks?

A 4.00 crank would cost more money that it's worth. If you're going that far, just a good, in-stock anywhere 4.15 crank...use shelf stocked pistons and rods...

Can the block handle 1000HP with a stock block? Maybe it would...once.

If you're spending at the 1000HP level only choice is an aftermarket block. Are they're even aftermarket blocks available in the low deck version...??