I have run the MP cast alum covers on all my
SB engines... they have NEVER leaked.. I have
one set on my W-2 right now that look stock
except for the 8 ign coils mounted to the covers
and they are doing great.. one thing about them..
they are heavy but they dont leak.. the other set
of them I milled the logo off of and polished.. the
polished set was on my W-9