408 Cam on the way

without re-reding it looks like LA pistons in a magnum block _+.020
so a .050 gasket should work with not loose piston to wall
good block finish get some cometics maybe .055
but measure all four corners first

on your cam
that'S why EVERY cam has to be checked
right SlantSix64
they have to move the lobe centers for best fit on the core
glad you found it instad of later posters are finding out