shelby GT project

I have a shelby GT 07 4.6 I have made some minor mods to it in the past 6 months like JBA headers, Mid Pipe w/cats, Roush exhaust, Steeda CAI, and a SCT tune. I installed the CAI about a month ago so i had to have it dynoed for a proper tune. Man was i excited about it,the car came stock with 325 HP so i was expecting close to 400 horses with all the work (and money) i had put into the car. Man was I dissapointed, result were in and i must have read/stared at that sheet a thousand times looking for an explination. I had 295rwhp with 305 lb/tq which is about 340HP. I then realized that if i really wanted some serious power i needed to turn to a S/C. 1st I bought the whipple HO system which can put up 550 easy but i could only run 450 on stock internals. So thats where the project kinda lossed all control I decided that I wanted more than 450 so I was going to either have to forge all the internals and buy a short block assembly to hold the power or go with a new block. I went with the FR 500 aluminum Block which is the same block used in "the cammer" engine. The Fr500 changes my displacement to a 5.0 and because of that I needed custom head and piston work. I replace about everything in the internals including a new steel cobra crankshaft, and a GT500 fuel pump. I had to intsall a new fly wheel so i also went with a mcleod twin disc clutch, and a new viper spec t56 tranny. the only week point after all that was a the drive shaft so i went ahead and replace the stock one with an aluminum sypdershaft. I bought some sylicon tubes to cover all my hoses and the shelby gauge cluster to see wat was goin on under the hood! Then last but not least i changed out my shorty headers for JBA longtubes and a new set of mid pipes with cats. Right now im running 550 horses to break in the engine but i plan to push it up throught out the year my goal is 700-750 which will take a lil while. I bought some blk halo headlights with the fog lamps and sum led tailights for a unique look to the car aswell. the next project will be suspension work, and maybe change the 3.55 to 3.73 but i have to replenish my wallet first.  

sorry i accidently posted this on the wrong group...