I finally got the 528 apart. Found some issues. #6 Jesel intake lash loose by .003, the paired rocker shaft was chewed up on the pushrod side of the offset rocker. The whole valvetrain will come apart AGAIN down to the individual rockers for inspection with a jewellers loop to look for anything getting ready to fail. Last outing the bypass in the oilpump stuck and i had had trouble pulling a prime with the Milodon five lobe extra volume pump. I use a single pickup and had capped the other intake port. That left a cavity of .590 x 4 inch plus the transfer slot on the unused side of the pump. I am going to fill it with a 9/16 × 4 inch piece of rod to see if that will eliminate the problem with poor/no priming.
The bearings were hurt. Mains not so bad, coating wore off on some and a few scratches. Rods were in tough shape with some serious smearing of bearing material on some. Crank had scratches on the rod throws, mains look good but maybe could use a polish.
So with having to regrind the rod journals i plan to offset grind them to 2.10 from 2.375 for a stroke of 4.400 to 4.410 for an added 32 cubes, bringing the motor out to 560 from 528. The rods will be changed to BME aluminum 6.815 c to c, .990 pins. Pistons are going to Line 2Line for coating. The cylinder bores need a rehone and will probably be out .002 or .003 oversize to get them cleaned up. The old rods were Manley Hbeam 6.965 long, 910 grams each. Going to aluminum and the 2.100 bearings ought to lighten things up a bit.
I am hoping to pick up .10 to .15 with the new combo. The 440-1 heads had been fully ported (years ago) with an intake volume of 365cc, 2.300 intake valves installed, alky injection and a 3x indy intake. The cam is a Jones Cams with 85510 intake lobes, .510 lobe lift, 284 dur @ .050. Exhaust are 85480 lobes with 296 @ .050 and .480 lobes, LSA is 114. Net lifts are about .850 and .800 . Both sides have 1.70 ratio rockers. Opinions on what this added 32 cubes may do for me appreciated! So thats the story. I hope to get it out by mid May next spring provided the snow is gone!!