I am also needing one I measured 34 and 1/2 form the centers. Am I off or just different.

Thats the same as my 311 per Formula. If it wasn't for the silent thunder platform you could just measure from the middle of transom assemblies

I would call IMCO direct. I did about 5 years ago and no problems. Looks great and STRONG. Welds were as nice as I have ever seen.

I ordered one from Eddie Marine, looks ok I will know more after I get it in my hands. $370 How bad did I do. If real bad don't tell me

I think same I paid last year, I shopped and price was fair. Some are made for boats that do 300mph and obviously over kill for mine under 70mph.
Note; be careful - A friend mechanic was helping me one day and while raising one drive by itself i yelled to stop while I was at transom a couple times until he did, he bent one of the ends.