1967 273 4bbl with Edelbrock 500 CFM Carb

Hey guys,

So I purchased this vehicle about a month ago now and it was running kinda sluggish. I took out the spark plugs and noticed it was running rich due to the black carbon build up on the ends. Cleaned them up, reapplied dielectric grease and attached the plugs. I looked at the carb (Edelbrock 500CFM AVS 2 with manual choke) and decided to try resetting the idle mix screws and realized the guy 2 owners previous who did engine work to it had them out almost 5 full turns. Reset to 1.5 out and idle RPMs in park are around 800+\- 25 rpm’s. Once I throw it into any other gear though it shifts extremely hard .
I also noticed that the fuel filter is only half full it’s never been like that since I’ve owned it so not sure what’s going on. The bowl got down to half way when I had gone for a drive for like 20 min. As soon as I let it cool and turned the car back on again it was full so not sure what was going on. Fuel pump? I’m pretty new to engines this is my first project car so trying to focus on making her drivable and safe for distance. I attached photos and a video for reference.

1965 Barracuda
1967 273 4bbl
1965 904 TF transmission 3 speed

here’s a link to a video of the hard shift and the engine running. The lockdown linkage looks a little weird to me in the video again haven’t touched it it’s how it came from the previous owner.

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