Big Block Hp Capability

Just for an update, I have been running 750hp on pump gas with a 77' 440 block thats .055" over with stock main caps and just a Hughes Main Girdle. We have 75 Dyno pulls to 7000rpm and over 2,000 hard miles on it so far. I just pulled the pan and looked at the bearings and everything looks perfect yet so far. As stated earlier, I believe balancing and a light reciprocating weight is key.