When I did the research for my engine decisions that had to be made, I liked Ford Racing's reputation the best. There are quite a few engine builders out there that boast high HP for little money, but Ford Racing did not seem too good to be true and Summit sells their stuff.
BUT, I ended up building my own. I took the money that I saved and put it into a stoker kit. Granted, I spent more in the long run, but more power is "more power".
It all depends on your budget, what you can do yourself, what HP/Torque you want. The cheapest way to go is build your 302 using stock parts to get about 200 HP, then build it up to 300 HP. After that it gets questsionable if Ford Racing is a better value. Especially if you lack Know-How, tools, or more importantly - TIME.
"I'll fix it or break it, Guaranteed!"