Bucking when underload

Sure does, I didn't even look good catch!

OP, that's not a great sign speaking from experience.

 

Believe I found the actual issue this time lol. Leaky fuel injector I pulled the plugs and it smelt like gas will update when I pull injectors/replace them

What was the fix from your experience?

 

New motor

 

So at this point I would strongly suggest determining the health of your motor before going any further with this car.

Compression and leakdown test are in order. I would also want to get a bore scope into the cylinders to see what things look like in there.

You are probably going to have to make some decisions about how much you like this car and what your budget is with regards to potential repairs.

Or you can do things backwards like I did but I don't recommend that route. Although I am pretty happy about it now!