I have a 318 with 4027593 heads (with small holes under each exhaust port). I have these manifolds:
![436.jpg 436.jpg](https://www.forabodiesonly.com/mopar/attachments/436-jpg.1716277887/)
Which I think are 3870387-4 but it's hard to read, the 3's could be 8's or vice versa:
![438.jpg 438.jpg](https://www.forabodiesonly.com/mopar/attachments/438-jpg.1716277890/)
The back side covers the holes:
![439.JPG 439.JPG](https://www.forabodiesonly.com/mopar/attachments/439-jpg.1716277889/)
The gaskets I used (back in 1987) were these:
![440.jpg 440.jpg](https://www.forabodiesonly.com/mopar/attachments/440-jpg.1716277892/)
Now I know there's a couple schools of thought about manifold gaskets (they're ok, vs you don't need them). I'd like to use them, but when browsing...
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Which I think are 3870387-4 but it's hard to read, the 3's could be 8's or vice versa:
The back side covers the holes:
The gaskets I used (back in 1987) were these:
Now I know there's a couple schools of thought about manifold gaskets (they're ok, vs you don't need them). I'd like to use them, but when browsing...
Read more