230-250 CI Air Cleaner

[Parker Vice]

Hello:
I am new to this forum and I need your help. I have restored a 1946 Willys CJ2A, a 1951 Suburban CarryAll and a few 1985 Chevy K-10's. I recently purchased a 1966 Chevy C-10 shortbed C-10 step side. This truck is really sweet and has 37,000 original miles. It was a one family owned truck. There are a couple of issues with it and I am replacing a few items with NOS parts. My objective is to keep this truck original. It is in really nice shape for the age of the vehicle.

I am looking for the correct air cleaner. The truck has a paper element filter and the top of the air cleaner was squished. It was domed. The fix that the previous owner performed was to add two 3/8 nuts as spacers and then he used a standard wing nut. I have been trying to find the correct lid and the flanged wing nut with the detents on the washer. I am not sure if this is a 230 or a 250 CI engine. My understanding is that the block and carb would be the same but the pistons are domed if it is a 250. I will find that out soon. Can you help me out please? Thank you