Hey guys I have an old 305 in an 83 Malibu, I plan on pulling it and putting in a 350 over the winter so it's alright if it's toast. I've only been into the hobby for a few years and this is the first knock/noise I've had so I'm lost on what's causing it. Ran good all last year and used it as a daily, parked it up in the winter and started it up a few months ago and this week too and both times it now has a knock when starting, its less frequent when it warms up but will just randomly stumble and knock, and goes away completely under slight throttle. I was thinking it was something like piston slap? Sorry if this is something obvious, just trying to get some help and knowledge from folks that know a lot more than me. I took a video of a cold start with the distributer wire disconnected and just cranked it. What do you guys think?
