I think I can help with the checklist for this set. I was able to compile the following by comparing pictures of a completed Venezuelan album to a completed 1978 Brazilian/Portuguese Figurinhas Super Herois album. The sets are only slightly different. The Venezuelan stickers have numbers on the front, and numbers 144 and 231 -- both Conan the Barbarian in the Brazilian set -- have been replaced with recolored versions of numbers 65 and 120 in the Venezuelan set. There are two numbers (63 and 199) for which I have not been able to identify specific characters, so I just listed them with their generic Spanish identifiers. Otherwise I think I have been able to list at least one specific character name in English for every other number.
1 Mr. Fantastic
2 Invisible Girl
3 Fantastic Four (top)
4 Fantastic Four (bottom)
5 Human Torch
6 Thing
7 Captain Marvel
8 Ms. Marvel
9 Hawkeye
10 Wasp
11 Hercules
12 Spider-Woman
13 Master of Kung Fu (top)
14 Master of Kung Fu (bottom)
15 Captain America / Human Torch (left)
16 Captain America / Human Torch (right)
17 Spider-Man
18 Thor
19 Scarlet Witch
20 Iron Man
21 Hulk
22 Sub-Mariner
23 Hela
24 Black Widow
25 Hellcat
26 She-Devil
27 Iron Man / Mandarin (top)
28 Iron Man / Mandarin (bottom)
29 Power Man
30 Mephisto
31 Hulk (left)
32 Hulk (right)
33 Silver Surfer
34 Black Panther
35 Daredevil
36 Falcon
37 Nova
38 Loki
39 Fantastic Four
40 Vision
41 Master of Kung Fu
42 Mysterio / Spider-Man (top)
43 Mysterio / Spider-Man (bottom)
44 Iron Fist
45 Captain America
46 Moondragon
47 Captain America
48 Captain America
49 Nomad
50 Daredevil
51 Mr. Fantastic
52 Ghost Rider
53 Silver Surfer
54 Yellowjacket
55 Hulk / Ikaris (top)
56 Hulk / Ikaris (bottom)
57 Tiger Shark
58 Namor / Triton
59 Master of Kung Fu
60 Iron Man
61 Spider-Man
62 Hercules / Iron Man
63 Tirador
64 Lizard / Nomad (left)
65 Lizard / Nomad (right)
66 Mephisto
67 Lucifer
68 Capricorn
69 Scarlet Scarab
70 Mercurio
71 Hellcat
72 Ms. Marvel
73 Moondragon
74 Lady Dorma
75 Spider-Woman
76 Sif
77 Loki / Sif (top)
78 Loki / Sif (bottom)
79 Spider-Man
80 Spider-Man
81 Beast
82 Falcon
83 Hulk
84 Molecule Man
85 Samurai
86 Nighthawk
87 Falcon / Living Mummy
88 Odin / Thor
89 Hulk / Namor / Silver Surfer
90 Destroyer / Thor
91 Captain Marvel / Mercurio (top)
92 Captain Marvel / Mercurio (bottom)
93 Nomad
94 Hawkeye / Valkyrie
95 Beetle
96 Man Thing
97 Number One
98 Galaxy Master
99 Krang
100 Tiger Shark
101 Kraven
102 Ulik
103 Scarlet Witch
104 Wasp
105 Princess Python
106 Madame Masque
107 Phoenix
108 Valkyrie
109 Nightshade
110 Mantis
111 Red Ghost
112 Black Panther
113 Iron Fist
114 Power Man
115 Human Torch
116 Spider-Man
117 Dr. Stange
118 Charlie-27
119 Stilt-Man / Trapster (left)
120 Stilt-Man / Trapster (right)
121 Captain America / Namor / Scarlet Scarab
122 Hulk / Iron Fist
123 Master of Kung Fu
124 Krang / Nomad
125 Deathbird / Ms. Marvel
126 Captain Marvel
127 Iron Man (top)
128 Iron Man (bottom)
129 Hulk
130 Thor
131 Ka-Zar
132 Kraven / Spider-Man
133 Daredevil
134 Ikaris
135 Black Jack Tarr
136 Hogun
137 Absorbing Man
138 Krylla
139 Matador
140 Green Goblin
141 Alchemoid
142 Green Goblin
143 Iron Man
144 Lizard (recolored #65)
145 Iceman
146 Union Jack
147 Namor
148 Doc Samson
149 Captain Marvel
150 Lord Seth
151 Collector
152 Dormammu
153 Commander Kraken
154 Skurge the Executioner
155 Cyclops Monster
156 Savage Robot
157 Genie
158 Draxon
159 Hulk / Namor
160 Namor / Triton (top)
161 Namor / Triton (bottom)
162 Iron Man
163 Deathbird / Ms. Marvel
164 Rhino / Spider-Man
165 Destroyer / Thor
166 Human Torch
167 Invisible Woman
168 Ms. Marvel
169 She-Devil
170 Leiko
171 Hela
172 Black Widow
173 Valkyrie
174 Red Sonja
175 Black Widow
176 Devastator
177 Serpent
178 Gladiator (Melvin Potter)
179 Crusher (Caldwell Rozza)
180 Pluto
181 Red Skull
182 Vulture
183 Spider Slayer
184 Golden Archer
185 Vance Astro
186 Moonstone (Lloyd Bloch)
187 Enemy of Kung Fu
188 Starhawk
189 Thor
190 Ikaris
191 Falcon
192 Boomerang
193 Vulture
194 Space Robot
195 Dr. Octopus
196 Loki
197 Midas
198 Ramrod Android
199 Vengador
200 Captain Marvel / Mercurio
201 Ms. Marvel
202 Enchantress / Loki / Skurge
203 Hercules / Thor (top)
204 Hercules / Thor (bottom)
205 Black Panther / Yeti
206 Human Torch / Paste Pot Pete
207 Thing
208 Fandral
209 Angel
210 Count Nefaria
211 Thing
212 Nick Fury
213 Hercules
214 Master of Kung Fu
215 Cyclops
216 Odin
217 The Un-Human
218 Living Mummy
219 Nikita
220 Fafnir the Dragon
221 Byrrah
222 Supreme Hydra
223 Tiger-Claw
224 Rawhide Kid
225 Hawkeye
226 Electro
227 Odin
228 Banshee
229 Colossus
230 Nova
231 Trapster (recolored #120)
232 Black Panther / Yeti (top)
233 Black Panther / Yeti (bottom)
234 Daredevil / Namor
235 Daughter of Fu Manchu
236 Daredevil
237 Red Skull
238 Thor
239 Daredevil
240 Infinitus
241 Harokin
242 Rhino
243 Gorgul
244 Attuma
245 Scorpion
246 Dr. Doom
247 Lizard
248 Xeron
249 Mangog
250 Amphibion
251 Kingpin
252 Mole Man
