350 engine swap from 305 URGENT!!!

[jeremywmalett]

Cracked the block on my 305 motor on my 1989 ariva open bow inboard outboard. So i am trying to install a 350 out of a 1980 camero. The flywheel will not work and I need to know what flywheel I have to get. Please help!!! I have everything else swapped and need to use the boat this coming weekend..
Inner diameter of hole is 2.5 inches
bolt diameter is 3.5 inches

[boats.net]

I'm not sure you might post this on the Mercruiser forum to see if any one there has made a swap like that.
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