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150 HP for a 305 Chevy Engine - Hate Me

Chevrolet 305 Engine
Since these heads are Vortec... 
   
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Chevrolet 305 Engine
Since these heads are Vortec style, we gained the improved sealing gaskets up top, but needed to be sure to order a Vortec-style Edelbrock AirGap intake, and also needed center-bolt style valve covers.
Chevrolet 305 Engine
A 650-cfm Speed Demon carb... 
   
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Chevrolet 305 Engine
A 650-cfm Speed Demon carb seemed like plenty for a 305, promising a good balance of low-end performance and top-end power. The full-throttle manifold vacuum peaked at under 1 in-hg. at the top of the dyno pulls, showing that it had plenty of flow capacity on this engine.
Chevrolet 305 Engine
What was our "Power Pack"... 
   
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Chevrolet 305 Engine
What was our "Power Pack" worth on the 305? How about 372 hp at 6,100 rpm? However you feel about 305s, you've gotta love that.
Chevrolet 305 Engine
RPM Stock TQ Mod TQ Stock HP Mod HP
2,600 285 290 141 144
2,800 283 297 151 158
3,000 287 320 164 182
3,200 291 328 177 200
3,400 290 334 188 216
3,600 284 337 195 231
3,800 279 340 202 246
4,000 271 346 206 264
4,200 264 349 211 279
4,400 256 349 214 292
4,500 252 350 216 300
4,600 250 348 219 305
4,800 241 344 220 314
5,000 233 342 221 326
5,200 221 343 219 339
5,400 - 337 - 347
5,600 - 330 - 352
5,800 - 324 - 358
6,000 - 322 - 368
6,100 - 320 - 372
6,200 - 314 - 370


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