My 2c after running a turbo pinto for a few years, starting with an SU 175 carb, then 45 DCOE weber then finally Efi with inter cooler.
Cam lift is important (for power and tourque). Generally the higher the maximum lift, then the lift at 1/4, 1/2 and 3/4 lift is also greater than a cam with less max lift. This means "greater area under the curve", which is the all important power maker.
Ideally, your cam would be relatively short duration with fast ramp up and down to give the maximum area under the curve, unfortunately this is limited by mechanical sympathy to the valve train, so a 270 deg 500" lift cam will probably wipe itself out very quickly. Bring on electronic valve actuation!
The best compromise I found with a turbo cam was 475" lift, 290 degree (seat) duration with a 108 lca (if i can recall correctly).
This gave a little bit of lag, but sung out to 6750 rpm really nicely with a t3 turbo on a 0.63 exh housing.
6750 rpm is safe for a well prepped standard rod and standard crank, although I did run second hand forged pistons. This setup lasted me for 10 years of casual competition work, and is still sitting in the garage as a spare engine.
A good upgrade was to move to a gt28 series BB turbo, this reduced the lag by a few hundred rpm.
Most cam grinders will do an NA spec cam with the lca opened out a little to reduce overlap. This is the easiest way to go.
By the way, hydraulic cam on a pinto? I've never heard of them. Do you simple mean a non-roller cam?