Its not very powerful at all. I have a 305 in my 1995 Sierra 4x4 probably around 225 hp,
Stock engine
310 hp
how much horse power does a stock 4.8 liter vortex Chevy engine have
300
more power than a stock engine
285
170hp
200
365
The V-tec engine makes a huge difference in racing. The V-Tec allows for power at high revs contra to lower rev power engines. Its main difference between stock engines is that it's acceleration is much better than a stock engine. Top end speed should be about the same.
Between 170 and 240 depending on the engine specs.
275 hp