I currently have an oldsmobile with a 307 that can't even beat my girlfriend's 140hp sunfire. The gas mileage isn't great either. So I want a 350. The problem is that I am relatively uneducated about the subject and don't know any of the tradeoffs.

What I am looking at:

GM part #10067353
249hp for about $1400, which seems like a great deal.

Then I see more power and get greedy; GM has a 330hp/350 HO for around $3500, so i looked around online to see what the options were above 300hp.
and I found a 385hp engine for $2500 at http://www.blueprintengines.com/popu...specs&pc_id=23
which is a nice medium as far as price goes and a great upgade in power.

What are the advantages and/ or disadvantages among the choices, such as how much worse will gas mileage be for something like the 385hp engine as opposed to the 249hp engine, etc. What do i need to look for in buying a 350?

Which would you go for. I don't race at the track, if that helps, although I think that may have been fairly obvious.