Nope not truck headers they are b-body headers.
i had to cut two tubes on one side to make them fit right and the other side was a bear to do . after looking at yours your look a hole lot better the what i have got. and gaves me a ideal to redo my headers . i don't have them welded up at this time just cut and pushed together so we may do something else.. this is what i have so far . it does fit very good and by the way this what my 15 year old son came up with he cut and put them together him self.