My 511 CID low deck (4.375 x 4.250 stroke) has aluminum main caps and enlarged to 440 size. I run a Callies crank. This block has almost 800 passes now. I was so happy back in the winter of 2010-2011 I did the same main change to my spare 400 block.

1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1