400 sbc build

[garrett3698]

Hi, I have a 1991 Chevy Camaro RS that has a 400 sbc in it. I bought the car with the 400 in it, and I recently came across why its not making a whole lot of power (Its making 210hp,325tq to the wheels.). It appears that the previous owner took the top end of a 305 tbi, (stock 1991 camaro motor) and slapped it ontop of a 400sb. So the heads, cam, intake, and tbi are all designed for a emissions 305 aka junk. I have a budget of $4000 to work with to beef up the motor. Ill have my parts list so far down below along with my power goals. Transmission is a borg warner t5, and yes I know, with my power goals it will go eventually, I have money out of my budget set aside for a t56 swap when that time comes. Rearend is a 10 bolt 7.5, stock on these cars, and its got a eaton trutrac locker in it, it currently runs 9.3 on the 1/8th mile. And I eventually plan to up to a ford 9 inch when that time comes aswell.

Parts List:
Holley Sniper EFI (https://www.summitracing.com/parts/sne-550-511k)
Edelbrock Torker II manifold https://www.summitracing.com/parts/edl-5001)
Brodix Cylinder Heads IK 200 (https://www.summitracing.com/parts/bro-1021001)
Holley EFI Distributor (https://www.summitracing.com/parts/hly-565-100)

apr headstuds, felpro-performance headgaskets, felpro intake gaskets

along with a comp cams 12-250-3, hydraulic flat tappet lifters, roller tip 1.5 rocker arms.

I'm shooting for 450-550hp+ at the flywheel, 400hp+ to the wheels, and I would like to know if this is possible with my parts list, because if it's not then id rather save my money and wait. Nitrous is also an option in my build. Maybe a 100-150 shot? I would have to do further research to find out how to set that up with a holley efi.