They did a 347 vs 351 in the 5.0 mag a couple of months back. I chose the the 347 because it is lighter and and I could use the parts that I already had. I see that you have canfield heads... they work exellent on stroker 302's and 351's so you can't go wrong.
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347 W/ A-trim 6#'s, Canfield heads, out of the box Systemax II intake, solid roller cam. 11.1 @123mph 1.46 60FT
93lx 5.0 daily driver
MY CAR
http://www.mustangworks.com/cgi-bin/...splay.cgi?1288