225 slant rebuild for more power

The motor is in the bed of my truck gonna take it to a machine shop after Christmas. I want to run a different cam so I’m looking for stronger valve train anybody have a link to a good kit to use and any recommendations for a more torquey cam. Going to deck the block shave the heads but run same piston assembly with new rings. I’m debating whether to go 4 or 2 barrel as well. Machine shop said $1k for complete job with a fresh Chrysler red paint job. But will need to give them the cam and valves everything else is included.