Re: V-6 Head serial numbers
 

305c has the same manifolds as the 305e.

Re: V-6 Head serial numbers
 

Generally the 305C will have the I beam style exhaust manifolds.

Re: V-6 Head serial numbers
 

I have 6 305c motors. Just pulled another from a 66. Everyone has the smooth manifolds. I will post some pics later.

Re: V-6 Head serial numbers
 

Charon, after checking several parts books dating up to 1974 it does support that "all" 305 engines came with the same part number exhaust manifolds which would be the smooth type. Evidently if you see a 305C with I beam manifolds they were replaced some point.:thumbsup:

Re: V-6 Head serial numbers
 

Here. Is a pic of a typical 305c engine. This came out of a 66 4000 series truck. I have been breaking these down for parts. I have been finding a few of these that have been rebuilt. And everyone uses the .030 over 3 ring pistons. I have been using these to build a small supply of good used cranks and bearings. And water pump cores. Plus the bonus spin on filter housings. And two groove pullys.