New engine questions

[72kool]

I have been weighing the options for engines between rebuild or crate and it just seems that crate is the way to go.
I am looking at an engine from summit and have some questions about it.
https://m.summitracing.com/parts/nal...53/none/images
Have any of you used this engine? Any feedback?

Also I have a craving for some good power. I'm not wanting a lot but noticeable from stock.

My question is, I have a chevy bowtie intake 14096242

http://m.ebay.com/itm/Mercruiser-5-7...257Ciid%253A20

What would be a good cam to mate with this intake to maximize hp and what could I expect to get out of this setup ?
The reason I ask about this intake is because I have it and if I can get reasonably more than stock with a good cam then I would like to use it. If it won't gain much, I don't want to spend that much extra for a new cam and new intake because I'm on a tight budget
Would I be better off just putting my stock parts on and leaving this engine in stock configuration?