273 Headers (weird combo)

318willrun said
through the years, just about every year.... lol. I don't know exactly. 70's, 80's, 90's, LA's, Magnum's.... I guess recently, I just put Doug's on my '76 318 heads.... Just had hedman's on my '85 318 in a truck, same headers are now on the 5.9 magnum in the truck..... Just put Hedman's on a '77 318 in a van .....
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Looks like TTI is where I saw that, read down the notes list for early A-Bodys. Around the early 70's the heads had the large exhaust flange for the egr ports so plenty of flange to seal the ports. Early 340's had much larger exhaust ports than early 273 and 318.