[jongolds]

Not really answer to your question but I just put a 300 Etec on my 73 Tsunami (with a bracket). I didn't get enough hours on it at the end of last season to give you any meaningful performance numbers I'm afraid. I'd originally planned to get a 250hp but the incremental cost to go up to 300hp seemed worthwhile at the time. I was replacing an early to mid 90's 225 Merc with triple carbs so it's not really an apples to apples comparison.