440 Block salvage part info needed(Machine shop thread followup)

No point in reinventing the wheel.
Any decent replacement h-beam rods and flat tops to go with them.
440 Source probably has both in stock.

Most of the power is in the heads/manifold/cam.

TF270’s are too big for your projected rpm range.

Keep in mind you’re only the cost of a crankshaft away from 500”.
Now is the time if you’re ever going to.