for a stock -70 340 car exept torker 2 intake and holley carb. stock conv 3.23 gears.
this will be a driver.

You said stock converter so it must be an automatic. You won't go wrong with a Comp 268 XE. The MP 272 cam would also be a good choice. Or call Jim Dowell at Racer Brown for a custom shaft. Hughes Engines has a nice line of cams, but they tend to be high lift relative to duration so checking clearances becomes even more important than usual.

Run some type of dual plane performance intake, RPM, LD340, Air Gap, instead of the torker II.

I'd run a cast iron 340 intake with a 1-2" 4 hole spacer before putting Torker on it.

The X268H or something similar is a good choice for a street car.

The torker II will work fine use a 4 hole spacer under the carb. i run 12.20 with a 360, flat tops, j heads, 3.91 gear.
Hughes or a vodoo, cam in the 226 to 234 @.050 would work best