Your carb is a ‘75-’76 CA emissions from a “Checker or Marine”. The exact type car it was actually used on might not be a Checker OR marine. Depending on what type choke and choke kicker(s) it’s equipped with and front or side fuel inlet would also be an indication of its actual application.
A couple tips:
- Put a thin piece of metal (like a .045” feeler gage blade) behind the roll pin that connects the acc. pump arm to the air horn to prevent it from butting against the air horn. This will allow you to get a small flat blade screwdriver behind the roll pin to lever it back into position at reassembly. There are 2 sizes of roll pins used, 1/16" and the bigger one, ~3/16", so you will need some smallish punches.
- Use a wide flat blade screwdriver to remove the needle valve seat. It’s wide and if the blade only engages one side it will bend and split it. Same thing w/the jets- there not too wide, but you want the blade to fit so as to not bugger the slots.
- Be sure to remove the rubber coated steel washer under the seat- it will almost always stick to the carb body and can be hard to see that it’s there. Use a sharp pick to carefully dislodge it for removal.
- Prolly the hardest thing is to align the primary rods w/the jets when you replace the power piston into its bore. This must be done basically blind- just be patient and you’ll get it. Don’t forget the plastic insert that surrounds the needle/seat- it goes in before the needles.
- Check the tiny holes for being blocked that lead from the main fuel bowl to the secondary wells. There is one on each side, about 0.030” to 0.040”, IIRC. Don’t enlarge them (0.040” MAX), just be sure they’re clean.
- Using the OLD check ball for the acc. pump (under a screw near the needle valve), reform the acc. pump seat by gently giving a firm tap to the check ball using a suitable punch and light hammer. This will ensure a good seal of the new check ball to its seat.
There are many more things that could be mentioned, but these couple things will hopefully help it to go back together easier for you.