65 barracuda Commando 273 /Formula S?

ya im looking to build a 340 and stroke it to a 408 and get around 550 tq and hp give or take a little im new to mopar been build chevys and figure i want a barracuda want to spend aroudn 3-5k for the motor maybe if there are any threads about someone doing something simular would be helpfull

here is the truck

70 chevy c10
350 4 bolt main
forged Crank
pro top line aluminum heads 72cc chamber
all retro roller rocker
rubens racing cam 234/242 @ 0.50 centerline at 104. lobe center 108
flat top pistions
but also have a 750 holley dp proform throttle body
aluminum fuel tank holley blue electric fuel pump.
compression ratio is about 9:5-1
mallory unilite disb. with msd 6al box
12 bolt posi rear end 3.7.3 gears