470 to a 305 swap out. pics

philbullet

Petty Officer 1st Class
Joined
Aug 14, 2014
Messages
241
So i found a pretty good deal on a boat with a nice clean 305 hp. looking to swap out complete package with the 470.
My question is how much more HP iam looking at and what weight difference iam looking at?
I have a 21' 1982 chris craft scorpion with a Alum. extend deck on stern and a boom n wench for trawling.Running a 21p 4 blade but probably need a 19p when loaded down.
 
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