When i was a teenager (early 80's), my best friend had a 77 K5. We decided to see how fast it would go. On I-75, we hit 120 mph. We got off on the exit, turned back toward home, and did it again. It had a 4-speed, if that matters.
This is interesting. I have a Mexican crate that i can not get to run right. I have changed everything. Literally everything connected to the motor, at least twice, many things 3 times, including the ecm and distributor. I guarantee i have more grounds than any member of this forum. I hate this...