I did get 402whp on the dyno with just a single plane intake and a holley 650dp and 1-7/8 headers and 3” exhaust. Changed the vvt-gear to a solid gear and thats it 🤷♂️. Since then I did change the cam and all that goes with it and put on a holley 850hp. Motortrend did the same cam-swap and did get around 530hp on the crank