1968 delta 88 curious about power output
 

hey everyone, i got a 68 88 and i just did a motor and trans swap, well my buddy did while im on deployment. i now have a 455 out of a 70 cutlass and a turbo 400 tranny. so from what the last owner has said my buddy told me it should put out 600 horsepower. i want yalls honest opinions of how much power it should be spitting out just by the specs, ill lable them below. also any suggestions for any changes or upgrades would be greatly appreciated, thanks. -ben
bigger heads

bigger valves bigger chamber

fresh valve job

lower rockers

480 big cam

double lower timing chain

cylinder head

heads have been drilled

3/8 stud on rockers

moroso valve covers

headers