In a message dated 97-08-23 12:21:47 EDT, firstname.lastname@example.org writes:
<< Compression ratio needs
attention also. In addition, water passages between block and head are
in different places and require drilling new ones in the head. Oh, dit I
mention push rod length? >>
I ran the DOOE casting 351w heads on a 289 for several years, and while it is
true that you must use different pushrods as well as head bolts with washers
under them (or the original style with the washers built on to the bolts),
you should have no problems with piston clearance with a stock cam. I know of
no holes that need to be drilled in the heads, but there IS a difference in
the way the water passages are shaped at the end of the heads. This requires
the use of 351 manifold gaskets.
The combustion chambers are larger than the 289 heads which lowers
compression some, but if the block is decked to the minimum .0015 piston/top
of block clearance, this should not be a problem. The heads breathe for
better than the stock 289 heads.