I’m refreshing a 67 Chevy II Nova that’s been in my family for almost 35 years. Just replaced the whole fuel system but the carb isn’t letting in fuel so I’m assuming there’s a blockage somewhere. When I crack the nut where the built in fuel filter in, the fuel pressure comes out of there and the carb is dry so that’s why I’m assuming there’s a blockage somewhere. Any help with things to check? I pulled the carb took the top half off to see if I could find anything noticeable but I don’t see much.