I'm surprised that those heads can make 900HP but then...I've never seen them. What do you feel needed changed to realize 900HP? Either way sounds like a good engine.
With the work done to the heads, they are basically improved 440-1 with the lower EZ exhaust port. So with 572 CID, 14.5 CR, lots of duration, Wilson intake, I can see the 900HP. Not EZs right from Indy... My old 540 with 440-1 CNC 345 heads was a copy of a 875HP motor and was only 13 CR.
Originally Posted by AndyF
heads were reworked to match this shortblock. Chambers opened up for the 4.50 bore size, 2.25 valves, etc.
