Header Idenification

[69W314spd]

Need Some help Identifying headers

2 sets of c3 Doug's headers (that's what written on them) BBC Part Number on flange looks to be D117

1 set of of 8132 BBC headers, (hooker or dougs maybe?)

1 Set of Hooker 6209 (351 ford i believe, Cougar maybe?)

Came from an IMSA racer that passed away is all the info i know, i checked the BBC headers on some heads i have and the bolt pattern lines up, however all the headers im used to seeing for corvette whether its side exhaust or not don't look like this?

The ford set is for sale, no idea what they are worth, don't look like they have ever been ran but one tube has some rust damage in a weird spot possibly from mice. Easily repaired