Building a slant for torque

triple weber 40 dcoe running 34 mm chokes, and a set of sensible bore headers (not huge you want high exhaust gas speed back to the merge) that merge at the rear passenger footwell.

that will help bow the torque curve out on the lower rpm side, some what, regardless of what you do to the rest of it.

if you rebuild it i'd use a dynamic CR calculator to assist with cam choice and decking/head skimming for static CR. keep the standard valves port size, a great big huge port is for high RPM/BHP and a smaller narrower one with webers keeps air speed high and makes the most of their ability to atomise the fuel.. superlative mixture at low rpm = more torque
port on port induction means mixture prefect for the cylinder who's vacuum created it. no distribution issues, no big plenum of wet globby mix at low rpm, no puddling of accelerator pump shot on plenum base, acelerator pump shot direct into hot port, file and angle pump jet mounting to get a fuel spray on the bench out the middle of the inlet manifold port for each cylinder (most applicable for the middle) ... etc etc etc.

chevy dude, (below link) but relevant and his little programme for download at the end takes all the maths out of it, if you have the figures for your motor to hand
aiem for DCR of 7.5-8

Dynamic CR

you'll be able to tow a plough up a cliff.... :)

Dave