Just seeing this....sorry to hear about this mazz....there was an old thread on this when I was mounting bracket:
http://www.classicseacraft.com/commu...p?t-19075.html
Im still running my old 250 DI and a 15x15 stainless OMC. I hated the viper!
I am about 3 3/4 to cav plate from flat keel.
Setback is 28"
Bracket keel is 4" above boat keel.