What does it take for 500+hp (adding 100+hp)

[Sleeper CP]

.
It's a '96 454, 990 rect port heads, 9:1 compression. The carb is a Q-Jet -that will be changed out. The recommendations so far have been change cam & carb for a solid & safe 500-500hp (0.636 lift 256 duration @ 0.50 on a 108), with a 1050 carb. Any other suggestions? Ideas or recommendations? What will the parts list consist of and $?
Thanks!
LC
FYI as a comparison our 512" Ford was 10.25 comp. good alumi A-460 heads, single 1050 carb it made 710 hp at 6,000 and 682 at 6,250. I told Danny Crower that I wanted it to be done at 6,000 and it was.
It had a soild roller and the spec's were: Dur. @.050 258 & 268 Adv. was 292-301 lift was .638 on a 108 lope sep. once again this was with a 1050 Dominator. It was a nitrous engine it turned 5,200 off the bottle and 6,000 on the bottle.
So the point being don't over cam or over carb your engine. You need to stick with a 850 if you do nothing else.
Sleeper CP
Big Inch Ford Lover

[ck7684]

990's are good heads, just get a good solid roller cam and there you go...
Here's a good article...
http://www.popularhotrodding.com/tec...evy/index.html
This is a pretty decent book too...
http://www.tower.com/details/details.cfm?wapi=101808286

[Legal Chemistry]

990's are good heads, just get a good solid roller cam and there you go...
Here's a good article...
http://www.popularhotrodding.com/tec...evy/index.html
http://www.tower.com/details/details.cfm?wapi=101808286
Thanks for the links... now if I can just get it to work together.

[roscoe p coltraine]

The motor that we have in my moms hydro makes 550-600HP. It has merlins that are out of the box, with 10.1 comp and a 630 lift roller. The carb is an 830. You will never need a 1050 for 550hp way to big of a carb. I have tried a duel plane and an open plane and did not see any differance. For a lake boat I would go with the duel plane. Just my 2 cents.
And she drives it better than you do too.

[ck7684]

My engine is very close to that PHR build with a few differences. I am running Edelbrock heads and a slightly different cam. I am also running logs n snails for exhaust. So far I have had it to 5300 RPM but I've just barely had it in the water, and the "lake" I tested on is only 1/2 mile long, so that doesnt give me much room. I can say that this engine is hella responsive though and makes good power and should be a reliable package...
http://www.youtube.com/watch?v=ydiSTrHiCAg