DC If you are going to race full time, the couple of things I would change is aftermarket block and use all the good parts from old motor. Save old motor as spare bullet for during race season. Have all the lastest oiling mods done to the block for faster return to
oil pan. If mind, add an
oil line to back of motor at the lifter galley. helps supply
oil to back crank and rods faster on startup and racing.
Can you go dry sump?? This would be a BIGGIE for longer life of the motor. Not cheap but worth it. If this is not doable add a 3 quart accusump to the oiling system with manual control.
rest of parts seam great and all work togeather for that motor combo.
When where the valve springs replaced?
No valve job but check the valves for sealing on the seats with fluid and a light valve hand grinding to reseal.
Intake manifold, if this was not ported send to Joe Craine to have ports balanced for flow, same applies for injectors, clean and have flow checked.
New O 2 sensors and way you go. Rick L Ps what main or rod bearing went??