2 Power Adders 600+RWHP and have a few ?'s of all sorts

[BlkBoostedV6]

First off I'm about to re-do the current combonation on the car and am looking to purchase a new short/long block, I need something that is going to be cabable of handling 2 power adders and withstand 600+ RWHP. I'm currently putting down 480 RWHP with only 10 psi and plan on upping it to around 20+ Psi and like everyone I want MORE. Obviously it will need to be a forged assembly, any recommendation as to where to buy the long block? Call me stupid but I like to buy all of my parts from Jeg's if possible. I was think of one of these http://www.jegs.com/webapp/wcs/stores/servlet/category_10001_10002_25701_-1_10763
see 3rd post for 2nd choice
but figured I'd get other opinions before commiting to anything. Will either support what I'll be making for HP or should I look else where. I know thet are cabable of the #'s but are they capable of withstand those #'s without coming apart?

Second ?, I currently have BBK equal lengh shorty's, H-Pipe w/ no cats, and SLP to finish it off. I would really like to install a set of full lengh BBK's and a Off Road X-pipe but I have a automatic, (Art Carr C4 w/brake reverse pattern full manual) is there a set of full lengh's that will fit a automatic?

And the last ? for now, After just installing the C4 w/brake I need to also focus on the rear suspension. I'm defidently installing Hotchkis uppers and lowers, but could use a recommendation on rear sway bar and springs?

Keep in mind I will only see the track MAYBE once a year. This is basicly a good weather daily driver and wanna keep fair street manners as much as possible.

Thanks In Advance Guys!!!!

 

[Blk91stang]

If you want to order from Jegs. This is the base motor I would start with. It is a 351 but I'm sure you can get it in a 302 or 347 whichever you prefer, just call them.

It comes down to the fact you need a good block and this is the only one Jegs offers right now that has a block to suit your needs. The first one you mentioned will split in half while the other I could not get to load.

 

[BlkBoostedV6]

This is the second one, dont know why it wouldnt load
http://www.jegs.com/webapp/wcs/stores/servlet/category_10001_10002_118169_-1_10763
The first is listed as a sportsman block, what is it capable of withstanding? I dont see what you recommended, did you forget the link? The motor doesnt have to come from Jegs, I just prefer it to if possible.

 

[tording]

I ordered a 331 shortblock from fox lake power products for my horsepower build. I had a good experience with them. I got the motor much ealier than they said and it was all custom with custom dished pistons and custom grind cam. If your looking to make that much power and run that much boost I would get the block o-ringed and the heads to match. I was running 15 psi with my twin turbo setup and I blew a headgasket. There might have been other events that caused it to go but just to be safe if I had it to do over again I would have opted for the o ringed block and heads.

Also if your looking to make that much power I would not go cheap with the engine management. I also wish I had done a FAST or Gen7 DFI system on mine. You can get close with the stock computer, but you will suffer some driveability issues with it I am sure. Good luck with whatever you decide.