5.7 Vortec basic upgrades

[ty_c]

I am doing a semi-short term engine install in my new to me 1970 Jimmy. Using a 5.7 Vortec engine and trans out of a 99 Suburban denor car. Thing is I would like to do some basic upgrades on this engine while I am doing the swap. 255hp stock from the 5.7. Thinking I can get to 320+ with a cam, black bear tune, long tube headers, and k&n filter. Might need some light head work dependent on cam choice. (springs, threaded studs, etc)

There seems to be the super basic bolt on guys who get 20-30hp increases and then much harder core guys pushing 400s. Not much inbetween I think I would like to stay out of the lower end (unless I really need more compression) and keep my budget on this to $500-1000. Unless I spring for a Weiand.

Torque is actually more important to me as I am looking for drivability but thought the hp reference might be more useful.

First thought was to contact Black Bear and ask them if they have a recommendation based on my needs.

All suggestions will be appreciated even if they are not taken.