If you want some cam knowledge, look here and scroll down.
# Camshaft identification - Lift - Description - Perf. rank.
1 105020320000 factory cam 9.10 mm Early 105 type, 1600cc 2
2 105020320001 factory cam 9.60 mm Std 1300 & 1600 cam 4
3 105480320001 factory cam 10.06 mm Euro 2000 & late 1750 cam 5
4 101210320000 factory cam 9.47 mm Std TI Super & Veloce cam 7
5 115010320032 Alfa Grp. 1 10.92 mm Same as CB 47 8L
6 CB47 Colombo & Bariani 11.00 mm Stamped "II". Body tuned 8L
7 CB48 Colombo & Bariani 11.93 mm Stamped "I2". Body tuned 9
8 101210320001 factory cam 10.52 mm Racing 1600 & 1750. Opt. for TI Super 10
9 Alquati A35 11.03 mm Racing 1750, 1800 & 2000. 10L
10 JK 303 Kent Cams 11.96 mm 2000 use with special valve springs 11L
11 Kent Cams ZL1 11.97 mm High rpm 2000 application 11
12 Colombo & Bariani CB 54 11C3 11.30 mm Stamped 11.3. High rpm circuit racing 12
13 Colombo & Bariani 11.3A 11.32 mm Original GTAm cam 12
14 Alquati A35-1 10.95 mm Flat lobe noses for xtra valve high-lift duration 12
And above doesnít include Richard Jemisons cams, which given the choice I would rather have.....but are £700 a pair.
However, you do appear to be a complete novice with limited funds. So I think you need to be practical with what a) you can afford, b) that you need someone who knows what they are doing, rather than combining skills of various engineers and people c) an understanding of what you will get with what, for what.
Given all that, you should leave your mods to head etc well alone, stick with, exhaust, carbs, and spend decent money on Dyno time with a good carb guy.
Iíve been down the road of mods, and all the rest. And the costs and time do ramp up. So you either dive in or not. Or get someone to give you a hassle free solution, but then you will end up spending 2-3 times more for their skills n services.
So if I were you. Know your limits and stay with the easy gains.