The best option is do your own research from the ground up. Sure, it's the same few quotes every time - enough time and money, anything can be swapped, anything can be built, anything can be boosted, anything can be sprayed... but what it comes down to is the people withOUT the know-how don't know how and the people WITH the know-how put their efforts into more feasible/affordable/easier/popular projects with other cars 999/1,000 times and follow through with projects 1/10,000. If you really want power beyond 300hp, it's up to you to research what power adders demand and what you'll need to change
The "inspirational" posts reference the same handful of builds - Quik's m90 (crashed), Stu Kelly's LS "Drift Taxi" (actively winning), the centri-then-turbo charged widebody (dismantled?), the 4.6L test mule (dismantled?), the blue 302 swap (somewhere in FL), Alax7's turbo with a hole in the piston (Alax doesn't come around often), Alinme's Toyota V8 swap (slow progress)... Take these "proofs" with a grain of salt. All of their builders had existing know-how and the non-builders are banking on someone else's learned knowledge
Trust me, we're all rooting for builds to work, but there seems to be too little overlap between LS owners and people with $20k to burn to make a $4k car run like a newer $10k used car ran from the factory. There's a 75k mile 09 G8 GT for sale in my area right now listed on craigslist for $11k. That buys me 355hp/384tq, a 4.7s 0-60, decent handling, and an actual aftermarket (not Corvette level in the US but still waaay better because Australia did all the leg work)
