I have some hard numbers.
On my 93 Cobra that I sold last Feb. I had a full bassani exhaust and a set of pullies and a MSD Ignition. I also swapped computers and installed a BBK 70mm TB. I dynoed 254 rwhp with that car. That is pretty close to 300 FWHP.
Honestly I don't think that just the cheap mods (mods under 400$) Will get you there. The mose restrictive partof that motor is the exhaust port on the E7's. You could easily get 300 FWHP out of a Stock headed, stock Intaked car. you would need to do some good porting, get a good exhaust, MAF, and TB though to do so.
You would need roughly 250 rwhp to hit 300 FWHP. And most tests on ported Intakes and Heads(stock) net about 35-40 rwhp together.
That would cost me out here about 500$ for the porting of both. Exhaust....roughly $450-500. TB, $200...MAF, $250. So you are looking at about $1450-1500 there.
IMHO, I would save extra and get a set of TFS TW's, a good Intake(TFS, Holley or Edelbrock) TFS is about 400 and kicks arse. A good cam and exhaust, TB and MAF. Trust me on this, because once you hit that 300 hp mark, you will get tired of it, and greed will sneak in, and then you will want 350 hp, and then 400 hp.....TRUST ME, I HAVE BEEN THERE
That is my data
Good Luck
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Dustin
89 Saleen GT Sport,
428 rwhp,TFS Street Heat Intake,TFS TW Heads,TFS #2 cam,BD-11A 9 psi,Crane 1.6 rr's,BBK 70mm TB,Pro-M 80mm MAF,MSD 6BTM, FMS 9mm wires,BBK longtubes,BBK Short H-pipe,American Thunder cat back,3.55's
12.3@119 street tires
11.496@121.08slicks