Isn't there a stock 250 knock sensor on the 77 and above Chevy 250 that can be used? The thread I found on knock sensors is talking about going to a V8 sensor. Is the V8 sensor better, or was there no viable knock sensor system on the 250 that I could use?

Knock sensor thread:
Knock Sensors


'71 Chevy Shortbox 250ci
'99 Jeep TJ 242ci
Inliner #5787